羊有跪乳之恩，鸦有反哺之义 英语翻译

The sheep has the feeling of filial piety, the crow has returns nurturing to parents righteousness

Drop the boon of the water, be to flow out spring to report mutually

滴水之恩当涌泉相报

简单点说就是
Even the animals know appreciating for breeding and giving back.

The sheep has the gratitude of kneeling down to suck milk. The crow has the instinct to feed its elderly mother.