重点讲解：
1. split up
拆分；（把…）分成若干较小部分；
eg. His land is split up into several widely scattered plots.
他的土地被分割成相当分散的几小块。
eg. Now , children, you must split up into two groups for this game.
孩子们，玩这种游戏必须分成两组。
2. in the dead of winter
在隆冬；
eg. Early one Thursday morning in the dead of winter I awoke to a blizzard.
隆冬时节的一个星期四，一大早醒来我就发现外面刮起了暴风雪。
eg. In the dead of winter they found the last survivors.
他们在隆冬时节找到了最后的那些幸存者。
3. be forced to do sth.
被迫做某事；
eg. The band was forced to cancel a string of live dates.
乐队被迫取消了一系列的现场表演。
eg. I was forced to sign the agreement against my will.
我被迫违心地在协议上签了字。