The second asteroid belt lies at about 20 astronomical units from the star, or a position comparable to Uranus in our solar system.

第二个行星带距离它的恒星为20个天文单位，这相当于太阳系中天王星的位置。

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A metric system of measurement units based upon the meter (length), gram (weight), second (time) and amperes (electrical current).

基于米(长度)、克(重量)、秒(时间)和安培(电流)的一种测量单位公制系统。

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If we think in terms of the names used for various units in the International, or meter-kilogram-second, System, a fair number are involved.

如果我们以国际单位制或米—千克—秒单位制中各种单位之名称的形式来考虑的话，相当数量的人被包括了。

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If we think in terms of the names used for various units in the International, or meter-kilogram-second, System, a fair number are involved.

如果我们以国际单位制或米—千克—秒单位制中各种单位之名称的形式来考虑的话，相当数量的人被包括了。

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