An estimated 99.85 percent of the massof our solar system is contained within the Sun, while the planets collectively make up most of the remaining 0.15 percent.
太阳占据了太阳系总质量的大约99.85%，而在剩余的0.15%中，行星占据了大部分。
2
Together with the kilogram, initially the massof a decaliter of distilled water, it formed the basis of the metric system.
它和千克（10升蒸馏水的重量）一起构成了公制计量的基本单位。
3
You just need a few macroscopic variables that are very familiar to you, like the pressure, the temperature, the volume, the number of moles of each component, the massof the system.