There she saw a big mass of water that was quickly advancing towards her.
在那儿,她看见大量的水向她快速袭来。
It's true that when matter and antimatter meet, they do annihilate in a big explosion and convert their mass to energy.
这是真的,当物质和反物质相遇时,它们会在大爆炸相互湮灭,然后把它们的质量转换为能量。
If a rocky planet is big enough - say, 10 times the mass of Earth - it can vacuum up so much hydrogen that its atmosphere ends up constituting most of the planet.
如果一个由岩石组成的行星足够的大——比方说,质量是地球的10倍——它可以吸收如此多的氢,以至于他的大气层最终会形成大部分的行星。
But they have really had a big scaling down of the mass transit system this year.
但是今年确实大幅度削减了公共交通。
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