世界上瓦特天平也为数不多,在可预见的未来,其数量也不会有增减。
This means that, although the kilo will in theory be defined by an abstract constant, inpractice so-called transfer standards will still be needed for the many countries without thenous or the cash to run a watt balance of their own.
这就意味着即使在理论上可以用抽象恒量来定义千克重量,许多国家在实际操作中还是要用到所谓的可变标准,因为他们本身即没能力也无资金来动用一台瓦特天平。
Translated into English, the upshot is that outside the most advanced countries, lumps ofmetal will continue to be used to define the kiloalthough they will probably be made ofgold, rather than platinum and iridium.
简单讲,就是发达国家以外的国家和地区会继续用金属块来定义千克重量,尽管金属块可能用金制成,而非铂铱合金。
These will be susceptible to exactly the same sorts of contamination that plague thecurrent generations of kilogram.
但金属块重量仍会受到同样的污染。
Luckily, Dr Cumpson s method ought to work on them, too.
所幸的是,坎普森博士的方法对它们也同样奏效。
词语解释
1.base on 基础上
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