??? 情景例句
Can I invite Alexandra to stay for dinner?
我可以請Alexandra留下來吃晚餐嗎？
Of evil grain,no good seed can come.
壞谷無好種。
and we have only to turn to that extraordinary discovery of echo-location in bats to see a case in which the voice plays a strictly utilitarian role.
我們只要看一看蝙蝠回聲定位這一極不尋常的發現，就可以探究一下聲音在什么情況下有絕對的實用價值。