perch vi.位于（高处）
be on the high position perch on 栖息 ---A bird perched on the branch of the tree at the moment. ---The little village perches among the hills. The hotel perched precariously on a steep hillside. She perched herself on a tall stool in the bar.
同意词：
assure v.向……保证，使确信，它的宾语一定 是人 --I assure you that I’ll bring your happiness. ensure:保证，确保，宾语可以是物 --Hard work can ensure our success. guarantee:担保 --I can guarantee the watch for ten months. Luckily, he had insured himself against long term illness. My house is insured against fire.
The higher a mountain is , the more people like to climb it. The more dangerous the mountain is, the more people want to conquer it.
needless to say,插入语 the more……the more…… ---The older you get, the more belongings you will accumulate. The more you get, the better you feel. Needless to say, the more courses you take, the more credits you will get.
