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重要量
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不要戴贵重珠宝和大量现金,以防被不法分子盯上
Do not wear conspicuous jewelry and carry excessive amount of money, which may make you a target of crime
正像对长度和重量
要有个标准
一样,同样也需要一个时间标准
just as with lengths and weights, so also do we need a standard of time
电可以在相隔一段距离的地方显示各种测量结果,这在许多场合都是很重要的
electricity permits indication of measurements at a distance, which is very important in many fields
这个金属罐本身再加上其中的空气的重量会比同容积的水的重量要轻许多
the weight of the metal can plus the air inside would be much less than a similar volume of water
重要文献摘要:"物理测量"
英
Key Abstracts: "Measurements in Physics"
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