青年中文by useful的意思
by useful中文翻譯：
按有用
useful───adj.有用的，有益的；有幫助的
useful charts───有用的圖表
useful tips───有用的提示
a useful───有用的
useful idiots───有用的傻瓜
useful book───有用的書
very useful───非常有用的
useful life───有效期，有效壽命；使用壽命；有效期
useful thing───有用的東西
reliability of GM counter tubes should be described by useful time before failure life and failure rate during life.───GM計數管的可靠性應當以失效的工作時間-壽命，以及在壽命期間的失效率來表征。
ration of the element's content and the lowest industrial grade can be used to determine whether the deposit be formed by useful materials or not.───有用物質可否成為礦床，取決于某元素含量與最低工業品位的比值。
I've lived through many "savage" times, without the direction provided by useful metrics in my process, and it's no pleasure.───我經歷過很長時間的“野蠻”時期，缺少有用指標對我的過程的指導，而且沒有快樂可言。
Furthermore, substantial progress has been made, helped by useful background papers from the International Monetary Fund.───此外，國際貨幣基金組織（IMF）的背景報告幫助取得了重大進展。
Reduce cost by useful methods; control and continually improve purchasing processes.───運用方法來降低成本，控制并持續改進采購過程；
Negative value basically is by " useful labor " blemish sex, limitation and certain ruinous form.───負價值主要是由“有用勞動”的缺陷性、局限性和某些破壞性形成的。
I've lived through many "savage" times, without the direction provided by useful metrics in my process, and it's no pleasure.───我經歷過很長時間的“野蠻”時期，缺少有用指標對我的過程的指導，而且沒有快樂可言。
The reliability of GM counter tubes should be described by useful time before failure life and failure rate during life.