燕子衔泥筑窠。

Swallows carry bits of earth in their bills to build nests.

《新英汉大辞典》

燕窝没有了，这对燕子重新衔泥筑巢。燕巢筑好后又被人捅破。

Not a bird's nest, which is the title of mud swallows to nest. was built after a good Pierce.

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“叽叽喳喳”、“呱呱呱”…动物们在唱春天的赞歌。燕子飞来飞去，衔泥作巢。

"Chirp", "quack quack"... the animals are singing hymns of spring. the swallows fly, take mud nest.

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