This is thought to make up 80 per cent of all matter in the universe and to stop galaxies from flying apart.

人们认为暗物质占宇宙物质的80%，是暗物质将星系聚在一起，防止彼此飞离。

youdao

The happy laughter, from flying apart from time to time here and there, like the calm sea continuously from here and there with surging wave.

愉快的笑声，不时地从这儿那儿飞扬开来，像平静的海面上不断地从这儿那儿涌起的波浪。

youdao

The happy laughter, from flying apart from time to time here and there, like the calm sea continuously from here and there with surging wave.

愉快的笑声，不时地从这儿那儿飞扬开来，像平静的海面上不断地从这儿那儿涌起的波浪。

youdao