poachers 偷猎者

rapid eye movement 睡梦中眼部的快速运动，属于睡眠周期中的一个阶段，简称 REM

power naps （用短时间来恢复能量的）小睡

测验 请听报道并回答下列问题。

1. How many hours a day do elephants in captivity sleep? 

2. Why did the elephants travel long distances, according to the text?

3. True or false? The two elephants are both female leaders of the herd.

4. Which word in the text means 'regularly repeated behaviours or practices'?

答案 1. How many hours a day do elephants in captivity sleep?

Elephants in captivity sleep for four to six hours a day. 

2. Why did the elephants travel long distances, according to the text?

According to the text, the elephants travelled long distances, perhaps to escape lions or poachers.

3. True or false? The two elephants are both female leaders of the herd.

True. Both elephants are matriarchs of the herd, and the word 'matriarch' here means 'the most powerful female of a group of family'.

4. Which word in the text means 'regularly repeated behaviours or practices'?

Habits.

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