它的名字和国际单位中表示基本聚合物质质量千克有关。
The name is a reference to International Prototype kilogram, as a base unit of mass in the International System of Units.
国际标准质量千克的原型就是由90%铂和10%铱的合金制成的。
The international prototype kilogram, the primary standard (see weights and measures) for weight, is made of an alloy comprising 90% platinum and 10% iridium.
由此我们可以算出这些纸的总质量为9千克。
如果算地球绕太阳，那就要放入太阳质量，大约是2乘以10，对30千克。
So if we take the Earth around the sun, then we have to put in the mass of the sun, which is about two times ten to the 30 kilograms.
弹簧常数k等于,牛顿每米，物体的质量，是0。1千克。
The spring constant k equals ten newtons per meter, and the mass of the object is 0.1 kilograms.
无人驾驶自由气球，是指无动力驱动、无人操纵、轻于空气、总质量大于4千克自由漂移的充气物体。
An unmanned free balloon shall refer to a freely drifting inflatable object which is driven with no power, is piloted by nobody, is lighter than air, and whose gross mass is more than 4 kilograms.
比如，质量单位千克，热力学温度开尔文，能量单位焦耳，电流强度单位安培，力单位牛顿等。
Such as kilogram of mass unit , Kelvin of thermodynamic temperature , Joule of energy unit , Ampere of electric current intensity and Newton of force unit and so on?
墨子号质量在600千克以上，进入距地面高度500公里的太阳同步轨道后，每90分钟环绕地球一圈。
The 600-plus-kilogram satellite will circle the Earth once every 90 minutes after it enters a sun-synchronous orbit at an altitude of 500 kilometers.
墨子号质量在600千克以上，进入距地面高度500公里的太阳同步轨道后，每90分钟环绕地球一圈。
The 600-plus-kilogram satellite will circle the Earth once every 90 minutes after it enters a sun-synchronous orbit at an altitude of 500 kilometers.
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