外研版英语必修三unit2重点单词1. Nutrition: This word refers to the process of providing or obtaining the necessary food substances for growth, health, and maintenance. It is also the study of these substances and their effect on our bodies.2. Balanced diet: A diet that contains all the necessary nutrients, in proper proportions, for maintaining good health.3. Junk food: Food that is high in calories, fat, sugar, and/or salt, but low in nutritional value. Examples include fast food, chips, soft drinks, and candy.4. Obesity: The condition of being significantly overweight, to the point where it may have a negative impact on a person's health.5. Malnutrition: A condition that results from an inadequate or unbalanced diet, causing a person to become ill or weak.6. Vitamin: Organic compounds that are essential for normal growth, metabolism, and overall health. They are typically obtained through food, as the body cannot produce enough of them on its own.7. Protein: Essential macronutrients that are made up of amino acids. They are necessary for the growth, repair, and maintenance of body tissues.8. Carbohydrate: One of the three main macronutrients, along with proteins and fats. Carbohydrates provide energy for the body and are found in foods such as bread, rice, pasta, and fruits.9. Fat: A nutrient that provides energy and helps the body absorb certain vitamins. It is important to consume healthy fats in moderation, as excessive consumption can lead to weight gain and other health problems.10. Calorie: A unit of measurement for energy. It represents the amount of energy required to raise the temperature of one gram of water by one degree Celsius.11. Fiber: A type of carbohydrate that is not digested by the body. It is important for maintaining a healthy digestive system and preventingconstipation.12. Nutrient: A substance that provides nourishment for the body. Nutrients include carbohydrates, proteins, fats, vitamins, minerals, and water.13. Digestion: The process of breaking down food into smaller molecules that can be absorbed by the body. It starts in the mouth with chewing and ends in the small intestine.14. Metabolism: The chemical processes that occur within a living organism to maintain life. It includes processes such as digestion, respiration, and energy production.15. Dietitian: A healthcare professional who specializes in the study of nutrition and its effects on health. They provide advice and guidance on healthy eating habits.16. Allergy: A condition in which the body's immune system reacts to a specific substance, such as certain foods or pollen. Common symptoms include rashes, itching, and difficulty breathing.17. Organic: Referring to food produced without the use of artificial chemicals, pesticides, or genetically modified organisms (GMOs).18. Vegetarianism: The practice of abstaining from the consumption of meat, poultry, and seafood. Vegetarians may still consume animal products such as eggs and dairy.19. Veganism: A lifestyle that avoids the use of animal products in all areas of life, including food, clothing, and cosmetics.20. Superfood: A food that is highly nutritious and considered beneficial for health and well-being. Examples include berries, nuts, and leafy greens.21. Antioxidant: A substance that inhibits oxidation, thereby protecting the body's cells from damage caused by free radicals. Antioxidants are found in fruits, vegetables, and other plant-based foods.22. BMI (Body Mass Index): A measure of body fat based on an individual's weight and height. It is used to assess whether a person is underweight, normal weight, overweight, or obese.23. Detox: A process or period of time in which a person avoids or removestoxic substances from their body, often by following a specific diet or using detoxifying products.24. Gluten-free: Referring to food that does not contain gluten, a protein found in wheat, barley, and rye. People with celiac disease or glutensensitivity follow a gluten-free diet.25. Paleo diet: A dietary plan based on the types of foods that might have been eaten by our ancestors during the Paleolithic era. It includes lean meats, fish, fruits, vegetables, nuts, and seeds.26. Ketogenic diet: A high-fat, adequate-protein, low-carbohydrate diet that forces the body to burn fats rather than carbohydrates. This can lead toweight loss and may have health benefits for certain individuals.27. Intermittent fasting: A dietary approach that cycles between periods of eating and fasting. It can be done in various ways, such as the 16/8 method or the 5:2 diet.28. Yogurt: A dairy product made by fermenting milk with bacteria. It is rich in protein, calcium, and vitamins, and can be a part of a healthy diet.29. Smoothie: A thick, cold beverage made by blending fruits, vegetables, and other ingredients such as ice, yogurt, or juice. Smoothies can be a nutritious snack or meal replacement.30. Caffeine: A natural stimulant found in coffee, tea, cocoa, and other products. It can have both positive and negative effects on health, depending on the amount consumed.31. Sugar substitute: An artificial or natural substance used to sweeten food and drinks, as an alternative to sugar. Examples include aspartame, stevia,and Splenda.32. Hydration: The process of replacing fluids in the body, usually bydrinking water or other beverages. Staying hydrated is important for maintaining proper bodily functions.33. Food pyramid: A visual representation of the recommended distribution of different food groups in a healthy diet. It suggests the types and amounts of food to eat each day.34. Portion control: The practice of managing the quantity of food consumed ina meal. It can help with weight management and overall dietary balance.35. Food label: Information found on food packaging that provides detailsabout the nutritional content, ingredients, and other relevant information about the product.36. GMO (Genetically Modified Organism): An organism whose genetic materialhas been altered using genetic engineering techniques. GMOs are commonly found in crops and can be present in food products.37. Sustainability: The ability to maintain certain practices or processes without causing harm to the environment or depleting resources. Sustainable food production is an important consideration in modern agriculture.38. Local food: Food that is produced, processed, and sold within a relatively small, defined area, often close to where consumers live. It supports local economies and can be more sustainable.39. Food security: The state in which all people, at all times, have physical, social, and economic access to sufficient, safe, and nutritious food that meets their dietary needs and food preferences for an active and healthy life.40. Food desert: An area, often urban, where fresh and healthy food isdifficult to find or access, usually due to a lack of grocery stores or markets.。
