因为质量比地球小的行星迁移速度缓慢，所以他们更易于在气盘中存活。

Planets smaller than Earth can easily survive in the disk because they migrate slowly.

youdao

实验结果表明，相对于全局搜索，所提方法大幅地提高了编码速度和压缩比，而解码质量只略有下降。

Experimental results indicate that comparing to exhaustive search, the proposed method improves the coding speed and compression ratio greatly with slight quality degradation of decoded image.

youdao

反过来，也就是说，它们的传播速度肯定比光速慢，因此它们应该是有质量的。

This, in turn, means they must travel slower than light and so have mass after all.

youdao