His calculations suggest Nemesis is between 3 to 5 times the mass of Jupiter, rather than the 13 Jupiter masses or greater that some scientists think is a necessary quality of a brown dwarf.

他的计算认为“复仇者”应该介于3 - 5倍木星质量，而不是某些科学家认为的13倍木星质量或者更大质量以达到形成褐矮星的必要质量。

youdao

The calculation of masses, centers of mass and moments of inertia of whole structure and components of rocket engines is a very important part of CAD and optimization of rocket engines and missiles.

火箭发动机整体结构及其部件的质量、质心位置和转动惯量的计算是火箭发动机及导弹的计算机辅助设计和优化问题中的重要组成部分。

youdao

Additionally, there is some evidence for intermediate-mass black holes (IMBHs), those with masses of a few thousand times that of the Sun.

另外，存在中间质量黑洞(IMBHs)的一些证据，那些黑洞具有几千倍太阳质量。

youdao

These samples were run through a mass spectrometer - a device that effectively measures all the masses of the chemical compounds in the breath.

BBC: Exhaled breath is unique fingerprint

Using Harps data, the astronomers also counted a total of 45 candidate planets with a mass below 30 Earth masses.

BBC: Trio of 'super-Earths' discovered