因为人们认为在宇宙大爆炸之后的短时间内，宇宙的温度就有这么高。

Because that's how hot the universe was thought to have been just after the Big Bang.

youdao

在很窄的温度范围以外，反应可能是爆炸性的。

The reaction may be explosive outside narrow temperature limits.

youdao

在很窄的温度范围以外，反应可能是爆炸性的。

The reaction may be explosive outside narrow temperature limits.

youdao