短語(yǔ)詞組短語(yǔ)Also Be Extremely Useful 也極有用be very useful t 精通be very useful at 精通;精曉be e useful to 對(duì)…有用be also useful as 作爲(wèi)be very useful to understand 理解它非常有用be a useful supplement to 對(duì)……有益補(bǔ)充be very useful for us 對(duì)我們很有用seem to be useful 似乎有作用 返回 be useful