They had to leave at midnight.

他们不得不半夜离开。

《牛津词典》

They had to take a 20% cut in pay.

他们不得不接受减薪20%。

《牛津词典》

They had to smash holes in the ice.

他们只好奋力在冰上凿洞。

《牛津词典》

They had to do this by firing the lunar module rocket engine for just the right amount of time.

VOA: special.2009.07.22

In order to keep the currency convertible they had to keep interest rates high to prevent people from demanding the gold.

为了保持货币的转换性,他们不得不将利率提高,以防人们向他们索求金子的兑换。

耶鲁公开课 - 金融市场课程节选

But all they had to do is rediscover what the masters already knew.

但现在所做的都是之前的大师们已经所做过的。

学习制作动画 - SpeakingMax英语口语达人

Found out later they had to come, boss made them come. (Laughter.) Come on.

WHITEHOUSE: Remarks by the President at Ohio University, Athens, OH

Executives quickly learned the one thing they had to avoid at all costs: downtime.

FORBES: Too Smart for its Own Good

Several months later, after more studies with the same results, they had to stop.

NPR: One Year Later, Guatemala Still Reeling from Stan