Swallows flying very low in spring rain.

燕子在春雨中飞得很低。

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There are many swallows flying in the sky.

天空中有许多燕子。

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The swallows are flying back in the spring.

春天燕子从南方飞回来。

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The swallows are flying back in the spring.

春天燕子从南方飞回来。

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