重點講解：
1. don't bother to do sth.
不用費心做某事；
eg. Lots of people don't bother to go through a marriage ceremony these days.
如今很多人不再費心思舉行婚禮。
eg. Do not bother to come and see me off.
別麻煩來送我了。
2. have no idea
（表示強調(diào)）不知道/一點兒都不知道；
eg. I have no idea what you mean.
我一點兒也不明白你的意思。
eg. We have no idea how to persuade him to give up the idea.
我們不知道如何說服他放棄這個念頭。
3. plunge into
將…投入；將…插入；將…刺進；
eg. She plunged her face into a bowl of cold water.
她把臉扎進一盆涼水里。
eg. Moved to tears,he resolved to plunge into the new battles.
他感動得流下淚來，決心投入新的戰(zhàn)斗。