Does that metal pit after contact with acid?

　　那種金屬同酸接觸后是否會起凹點？

　　The acid has burnt a hole in my jacket.

　　這種酸把我的上衣燒了一個窟窿。

　　Handle with care, or the acid may get out.

　　小心輕放，否則酸要淌出來。

　　Acid acts on most metals.

　　酸對大多數金屬起作用。

　　Hydrazoic acid in liquid form is very dangerous.

　　處于液態(tài)的疊氮酸是很危險的。

　　Acid causes metal to corrode.

　　酸使金屬腐蝕。