乌鸦反哺,羊羔跪乳
Crows feed their parents in return and lambs kneel to suckle
以上为机器翻译结果，长、整句建议使用 人工翻译 。
在人世间谁何尝不知：“羊羔有跪乳之恩，乌鸦有反哺之意。”
In this world who did know: "lamb has the grace of milk on my hands and knees, crows have feedback."
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