22-04-21 5. Cash cow 5.摇钱树 a dependable source of income; a product or service that makes money 可靠的收入来源；赚钱的产品或服务 Our companys cash cow is the sales department, which makes enough income to finance the developers. 销售部是我们公司的摇钱树，...

21-10-04 Baby frogs went on a picnic in the woods. Getting out of the pond for the first time, they sang merrily. 小青蛙们在树林里野餐。这是他们第一次从池塘里出来，他们正在愉快地唱歌。 Then, they found a cow grazing in a field. Oh, my! What is that? It is hu...