zero mass

When aimed at a mass audience, the power of a memo will always be zero.

当大面积群发时，备忘录的效力总是为零。

Usually the Dirac equation with zero static mass is regarded as the wave equation of neutrino.

对把静质量为零的狄拉克方程当作是中微子的波动方程的看法予以否定.

F= ma I know, from Newton's Second Law F equals ma that there is no acceleration, so this must be zero so the sum of all forces on that mass must be zero.

根据牛顿第二定律-，合加速度为零，因此公式结果为零，整体中所有力的矢量和必为零。

When the mass of axion approaches to zero, the above process expresses some similar characters to the conversion of the photons to the gravitons.

在轴子质量趋于零的极限条件下，上述过程和光子转化为引力子的过程表现出某些非常类似的性质。

The reduction of p-nitrobenzene ( PNT) and m-dinitrobenzene ( MDNB) in three kinds of soils by zero-valent iron ( ZVI) at normal temperature and pressure was studied using gas chromatography-mass spectrometry ( GC-MS).

用气相色谱-质谱联用仪（GC-MS）对零价铁在常温常压下还原3种土壤中对硝基苯和间二硝基苯进行了研究。