Divanadyl
二氧化釩根(四價根)
??? 情景例句
I can see that you've done this before.
我發覺你曾干過此事。
To worry
煩惱，擔心
as my wife and I discovered during a tour through the Balkans.
我與妻子在一次周游巴爾干半島時對此深有體會。