I like to study in the library because it's so quiet.
我喜欢在图书馆学习因为那儿很安静。
While we were having breakfast,John was talking on the telephone.
当我们正在吃早餐时,约翰正在打电话。
Despite the fact that the bottle is tinted a delicate shade of green, an observant visitor would soon notice that it is filled with what looks like a thick, grayish substance.