si unit si 单位
- Sievert / Sv refers to the SI unit of personal dose.
一七西弗:指国际单位制之人员剂量单位。 - Today the mass standard is the last remaining SI unit based on an unique man-made object.
摘要质量基准是迄今唯一保留人工制品的SI单位。 - Other countries use the joule, the unit of energy in the International System of Units (SI).
其他的国家使用焦耳,国际单位制(SI)中的能量单位。
si unit[ noun ]
a complete metric system of units of measurement for scientists; fundamental quantities are length (meter) and mass (kilogram) and time (second) and electric current (ampere) and temperature (kelvin) and amount of matter (mole) and luminous intensity (candela)
<noun.quantity>
Today the United States is the only country in the world not totally committed to the Systeme International d'Unites