1.this machine is used to ? air currents. 2.he was ? the crowd going by.

Question

3.Tom likes ? behavior of the birds in the mountains.
watch look see notice observe这几个单词怎么写

Answer 1

回答如下：
1. This machine is used to observe air currents. 这个机器用来观察气流。
2. He was watching the crowd going by. 他正在观看走过的人群。
3. Tom likes observing the behaviour of the birds in the mountains. 汤姆喜欢观察山里鸟的习性。
observe: 指长时间地观察、研究。
watch：注视、观看移动的物体。watch sb 注视某人的举动。
see：指动作的结果：看到，见到。see sb看到某人。
notice：指动作的结果：注意到。
look at ：指注视宾语。look at sb注视着某人。

Answer 2

1 observe 观察
2 looking at 正在看
3 watching 正在观察