2, the crow has the meaning of feeding back, and the sheep knows the grace of breastfeeding.

3, the grace of dripping water, when the spring comes.

4, but the inch of long grass is a little sentimental, and it is reported to be three spring rays.

Bees sip honey from flowers and thank the camp when they leave. The grandiose butterfly thinks that flowers should thank him. Tagore

6, people help me, never forget; I help people, remember. -Hua

7. Every favor has a barb, which will hook the mouth that devours it, and the benefactor can drag it wherever he wants-Don.

8. ingratitude is worse than lying, vanity, rap, drunkenness or other evils that exist in the hearts of vulnerable people-English proverb

9. Mean people are always ungrateful: ingratitude is a despicable part-Hugo.

10, ungrateful people are in trouble and cannot be saved-Greek proverb