比如说，重力可能会稍微强一些，或者强很多，或者弱一些。
Gravity (for example) could have been slightly stronger, or alot stronger, or slightly weaker.
和宇宙中的其他三种力(电磁力、弱核力、强核力)相比，重力就微弱得多了，所以引力波很难被观测。
Compared with the other three forces in the universe (electromagnetism, the weak nuclear force and the strong nuclear force), gravity is relatively feeble, making gravitational waves hard to detect.
本文主要开展梯度强磁模拟微重力环境下SHS过程的传热传质等基础性研究。
The paper studies the heat, mass transfer and some basic problems of SHS under gradient strong magnetic field simulated microgravity.
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