齐国开始发动第二轮进攻，他们重新擂起战鼓。

Qi began to launch the second round of attacks. They beat the drums again.

youdao

只过了几分钟，敌人又开始发动进攻了。

It was only a few minutes before the enemy made another attack.

youdao

在把敌人包围之后， 我们就开始发动攻击。

We started the attack when we had got the enemy encircled.

youdao

Like when they devised the first engines or the first nuclear reactors, it didn't work so well at first and then from the experience of many people working on it, over many years, a body of knowledge emerges and that's what we call technology.

这和发明出第一个发动机,或者第一个核反应堆时一样,最开始总是存在很多问题,但随着很多人不断努力去完善它,一种理论体系才得以不断发展,这就是我们所说的科技

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