在那次对话中，埋藏着一个绝妙想法的萌芽。

In that conversation lay ___the ___germ ___of a brilliant idea.

那个看似微小的事件，是整个革命的开端。

That seemingly minor event was ___the ___germ ___of the entire revolution.

他早期的研究已蕴含了他后来的相对论思想的雏形。

His early research contained ___the ___germ ___of his later theory of relativity.