2) dive into 跳水(头朝下); 迅速把手伸入…; (对活动, 问题等) 全心投入, 潜心研究
He dived into the history of China． The boy dived into the river from the bridge He dived into his pockets and fished out one dollar．
3) every / each time 意为“每次; 每当”,
此短语在句子中经常作连接词, 引导时间 状语从句做连词的名词, 引导时间状语从句。 能用做连词的名词短语还有：
the first time 第一次 last time 上次 next time 下次
the instant / moment / minute / second …
意为“出发到……去”
Let’s set out before dark.
我们天黑前动身吧。
Tomorrow I’ll set out for Beijing.
明天我将出发去北京。
3. This original telegraph sent a message over distance using Morse code (a series of dots tapped out along a wire in a particular order). 这种原始的电报是在一段距离中用莫尔斯 电码传递信息（莫尔斯电码是通过电线发 出的以特定的次序敲击出的一串点）。
tap n. 轻轻地敲击；水龙头 He cleaned his hands in the cold water from the tap. 他用自来水龙头流出的凉水把手洗净。 v. 轻打;轻敲;轻拍 That girl tapped her fingers on the desk impatiently. 那个女孩不耐烦地用手指轻扣桌面。
