擦干净了没?
The cleaning that attempts to keep the kilogram constant is done by a member of staff atthe bureau, using a combination of steam and a chamois-leather cloth soaked in ethanoland ether.
试图保持金属块重量恒定的清洁任务由国际计量局员工来做,用蒸汽和浸泡过含乙醇溶液的油鞣革布来进行清洁。
But given the sensitivity of modern instruments, which can detect gains or losses of theorder of billionths of a kilogram, it must be done properly.
但鉴于现代工具测量十分精细,物体重量增减十亿分之一千克都可以测出来,这项清洁工作必须谨慎执行。
Too gentle a rubdown leaves contaminants on the surface. Too vigorous a scrubbing erodesthe metal itself.
擦拭太过温柔,其表面会留有污染物;用力过猛,又会擦掉金属本身的表面成分。
Worse, the IRK is not the only such cylinder in the world.
更糟的是,国际千克原器并不是这个世界上唯一的此类圆柱体。
Dozens of replicas exist in official laboratories in many countries.
还有几十个类似的复制品存放在许多其他国家的官方实验室里。
Each must be cleaned to the same exacting standards if it is to remain a true copy of theFrench original.
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