The exoplanet is a few times the mass of Earth, but it should still be small enough to be rocky rather than a gas giant like Jupiter.

这个系外行星的质量是地球的几倍，但是它足够小，能够由岩石构成，而不是像木星是一团巨大的气体。

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On-line liquid chromatography-mass spectrometry is a high throughput method for the analysis of small molecules in biofluids.

在线液相色谱-质谱联用法是一种高通量的方法，用于分析生物流体中的小分子。

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Gliese 876 is a small, red star with about one-third the mass of the sun.

“格里斯876”是一颗小型红色恒星，其质量约为太阳的三分之一。

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If we think of the size of a typical atom, we would say that would be about 10 to the negative 10 meters. So, we can see the diameter of a nucleus is absolutely smaller really concentrating that mass into a very small space.

一个普通细胞的大小，抱歉，我和细胞核搞混了0,如果我们考虑，一个普通原子的大小,这大概是10的负十次方米,所以原子核的直径确实非常小,真的是把质量。

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Beneath them is a mass of small and medium-sized firms that collectively employ around half of American workers and are heavily reliant on banks.

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When these isotopes are combined at high temperatures, a small amount of mass is lost and a colossal amount of energy is released.

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"The land mass of the country may be small but it is spread out over a huge area, so it offers a fairly unique logistical problem -- particularly if you need to implement a regular league season, " he said.

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