飞段被复活多少集:That rule is useful once in a blue moon.这句话如何翻译啊,请大家帮帮我啊

That rule is useful once in a blue moon.这句话如何翻译啊,请大家帮帮我啊 Should education be a process of learning that is useful to future? 回答Should education be a process of learning that is useful to future? we should do everything that is useful to the pelple.这句话用没有语法错误,怎么翻译? This is such a useful information that all of us believe it's very important.对不对 This is so useful an information that all of us believe it's very important.对不对 English is a useful tool. A house is a useful animal 翻译 题目：Reading is useful 求写作 A dictionary is an useful book.找错