Does that metal pit after contact with acid?
那种金属同酸接触后是否会起凹点？
The acid has burnt a hole in my jacket.
这种酸把我的上衣烧了一个窟窿。
Handle with care, or the acid may get out.
小心轻放，否则酸要淌出来。
Acid acts on most metals.
酸对大多数金属起作用。
Hydrazoic acid in liquid form is very dangerous.
处于液态的叠氮酸是很危险的。
Acid causes metal to corrode.
酸使金属腐蚀。