第116期:宇宙云

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.

译文：

巨大的宇宙云的存在，实际上是使20世纪20年代首次提出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。

点睛：

该句的主干是The existence...was...required...。first put forward in the 1920s是插入语，用于修饰限定之前的the Big Bang，其中put forward和the Big Bang之间是被动关系。介词短语as...是reign的补足语。

考点归纳：

与put相关的常见短语还有：

*put off推迟，延期
The meeting's been put off till next week.
会议已推迟到下星期。

*put on穿上，涂上
It takes me about half an hour to put my make-up on every morning.
我每天早上要花大约半小时化妆。

*put out熄灭，关（灯）
The fire was finally put out.
火终于被熄灭了。