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1·A flock of sheep is walking back and forth on the grassland.

一群羊在草原上来回走动。

2·I saw a flock of sheep when the car passed through a village.

当汽车行经村庄时，我看到了一群羊。《新英汉大辞典》

3·They raised a flock of sheep.

他们养着一群羊。

4·A flock of sheep blocked the road.

一群绵羊挡住了道路。

5·He keeps a flock of sheep.

他养了一群羊。

6·A flock of sheep have just passed by!

一群羊刚过去了！

7·A flock of sheep are ranging over the grassland.

一群羊在草原上来回走动。

8·A flock of sheep descended slowly from a hill.

一群羊慢慢地从山上下来。

9·The children huddled together like a flock of sheep.

那些孩子像一群羊一样挤在一起。

10·We saw a flock of sheep grazing on the hillside.

我们看见一群羊在山丘上吃草。