听力原文

In summer, the monkeys go around in huge bands, but at this lean time of the year they split up into smaller foraging parties.
在夏天，猴子成群活动。但是在每年的艰苦时期，它们分裂成了更小的队伍搜寻食物。
In the dead of winter, the monkeys are forced to rummage around the rocks for a few meagre morsels of lichen and moss.
隆冬时期，猴子们被迫在石头中搜寻食物，只能找到很少的地衣和苔藓。

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重点讲解

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。