What were the main forces behind its evolvement?

在它演进的背后，主要力量是什么？

youdao

We avoided the enemy's main forces and struck at his weak spots.

我们避开敌人主力，打击他们的弱点。

youdao

We avoided the enemy's main forces and struck at his weak spots.

我们避开敌人主力，打击他们的弱点。

youdao