At the observed speeds, the outer galaxies should be flung out into space, since the clusters don't appear to have enough mass to keep the galaxies at their edges gravitationally bound.

星系外环应以可以观测到的速度被甩入太空，因为星团的质量不足以通过万有引力来束缚星系的边缘部分。

youdao

Now that the inner edges of the left and right visible doorways butt up against each other, we no longer need to keep the left image in the front.

现在，左侧与右侧，可见“doorway”的边缘接在一起，我们再不需要将左边图像保持在上方。

youdao

Until the edges contracted and the gaping expanse filled in on its own, he and his wife would have to pack damp gauze into the wound every day to keep it clean and help it heal.

直到伤口边缘开始收缩，裂缝开始主动填补修复时，他和他的妻子才可以每天向伤口里塞满潮湿的纱布以保持它洁净并帮助修复。

youdao

The idea is to burn these bricks around the edges of fields to keep elephants away.

VOA: special.2010.07.27

Somehow, though, Toshiba managed to keep the edges round, similar to lots of other machines in the company's lineup.

ENGADGET: Toshiba KIRAbook hands-on (video) Hands-on