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1·The explosion scattered a flock of birds roosting in the trees.

爆炸声把栖息在树丛中的鸟群惊散了。《牛津词典》

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

一群羊在草原上来回走动。

3·A flock of white birds dip over gray-tiled rooftops and persimmon trees.

一群白色的鸽子停在灰色的屋瓦上、点缀在柿子树丛里。

4·A hungry prairie dog carried on nibbling his nut as a flock of starlings tried to get his lunch, and he completely ignored them.

当一群椋鸟试图抢走一只饥饿的草原土拨鼠的午餐的时候，这只土拨鼠继续啃咬他的坚果，完全无视它们的存在。

5·A flock of sea gulls are hovering over the deck.

一群海鸥在甲板上空飞翔。《新英汉大辞典》

6·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》

7·They raised a flock of sheep.

他们养着一群羊。

8·The Zoo has a flock of 64 flamingos.

动物园有64只火烈鸟。

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

一群羊在草原上来回走动。

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

那些孩子像一群羊一样挤在一起。