Don 't use time or words carelessly. Neither can be retrieved.
不要轻率的使用时间或言辞，因为二者都不可能被收回。
You don "t use your time profitably."
你没有有效利用时间。
If the filament transformer has a center tap, don 't use it.
如果变压器灯丝绕组有抽头，请不要使用它。
Don "t use abbreviations unless you" re quite sure your reader will understand them.
不要使用缩写除非你很确定对方一定能理解。
Don? T use time or words carelessly. Neither can be retrieved. Life is not a race, but a journey to be savored each step of the way.
不要随意运用时间和言语。两者都不可能被收回。生活不是赛跑，而是旅行，每一步都宜细细品尝的。
Don? T use time or words carelessly. Neither can be retrieved. Life is not a race, but a journey to be savored each step of the way.
不要随意运用时间和言语。两者都不可能被收回。生活不是赛跑，而是旅行，每一步都宜细细品尝的。
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