He was compelled by illness to suspend his experiment.

他因病不得不暂时中断实验。

I feel constrained to write and ask for your forgiveness.

我不得不写信请你原谅。

The explorers had to undergo much suffering.

探险者不得不受很多困苦。

They had to thread through the narrow passages.

他们不得不穿过狭窄的通道。

She has to face the brutal reality.

她不得不去面对冷酷的现实。

We have to alter the house into a barn.

我们不得不改建成谷。

He had to fight back tears of frustration.

他不得不失意的泪水。

We have to harry him for money.

我们不得不常常缠着他要钱。

I had to walk very fast to overtake you.

我不得不快走才能赶过你。

United will be forced to make several positional changes.

联队将不得不做一些位置变化。

I had to concede that I'd overreacted.

我不得不承认我反应过度了。

We had to abandon our abortive attempts.

我们的尝试没有成功，不得不放弃。

When her husband died she had to become the breadwinner.

她丈夫死后，她不得不赚钱养家。

Doctors are having to cope with an everexpanding workload.

医生不得不应付日益增加的工作量。

I had to run away from my creditor whom I made a usurious loan.

我借了高利贷不得不四处躲债。

They will have to block up the entrance to the tunnel.

他们将不得不封闭通往隧道的入口。

Adverse circumstances compelled him to close his business.

生意不景气,迫使他不得不停业。

I have to blush to admit that thing.

我不得不羞愧地承认了那件事。

I am sorry to have to inflict my company upon you.

对不起, 我不得不打扰你一下。

He had to look after his invalid brother.

他不得不照看他有病的弟弟。