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。

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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。

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Carbon-fibre belts prevented the rapidly spinning parts from flying apart under their own centrifugal force.

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