His ideas are coming back into fashion (= they are becoming popular again ) .
他的观点又流行起来。
Their music will never go out of fashion (= stop being fashionable ) .
他们的音乐永不过时。
Self-help books are all the fashion (= they are very fashionable ) .
自助类的书籍很流行。
adj. fashionable
adv. fashionably