译文：山间的溪水容易上涨和退却，小人的心思容易反反复复。赏析：君子胸怀坦荡，光明磊落，真诚待人，和君子相处，如沐春风，让人心旷神怡。而小人心胸狭窄，鸡肠鼠肚，睚眦必报，和小人交往，无异于和豺狼同行。
Don't try to win a friend by presenting gifts。You should instead contribute your sincere love and learn how to win others 'heart through appropriate ways.
Small changes in farming practices can lead to big impacts on global food security.
如果农民不知道如何有效使用，最先进的技术也毫无价值。