Scherbakovite
硅鈮鋇鈉石
??? 情景例句
I came to that conclusion.
我的結論也是這樣。
You don't have to pay any duty on personal belongings.
你不必在個人財產上付任何稅。
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。