to maintain its reign as

The existence of the giant clouds was virtually required for the Big Bang,first put forward in the 1920s,to maintain its reign as the dominant explanation of the cosmos.

巨大的宇宙云的存在，实际上是使二十年代首创的大爆炸论得以保持其宇宙起源论的主导地位所不可缺少的。

The existence of the giant clouds was virtually required for the BigBang, first put forward in the 1920s, to maintain its reign as the dominant explanation of the cosmos.

巨大的宇宙云的存在，实际上是使二十年代首创的大爆炸论得以保持其宇宙起源论的主导地位所不可缺少的。

The existence of the grant clouds was brutally required for the Big Bang, first put forward in the 1920s, to maintain its reign as the dominant explanation of the cosmos.

巨大的宇宙的存在，实际上是使20年代首创的大爆炸论得以保持其宇宙起源论的主导地位所不可缺少的。