一定发生了用英语怎么写

It must have happened

一定───certain;发生───happen

The symptoms may be exacerbated by certain drugs.───这些症状可能会因为某些药物而加重。

It'seemed certain that this would win the prize.───这一块会得奖,这似乎是肯定的了.

There are a lot of preliminaries to be gone through before you can visit certain foreigners.───在访问某些外国人之前要做好许多准备工作.

That's true, to a certain extent.───在一定程度上的确如此。

When the doctor answered the phone, Mr gilbert said he was inquiring about a certain patient, a Mr gilbert.───当医生接电话时, 吉尔伯特先生说,他是在打听一位叫吉尔伯特先生的病人.

A period of depression can be a perfectly natural response to certain aspects of life.───某段时间感到抑郁可能是对生活某些方面很正常的反应。

It is good practice to write to a certain length.───按照一定的长度进行写作是一种好的练习.

I can tell you for certain that I am always honest.───我可以肯定地告诉你,我一向是老实的.

Non-white people are effectively excluded from certain jobs.

Nothing is certain but death and taxes.

Certain problems were apparent from the outset.

He had been miraculously saved from almost certain death.

I tend to overuse certain favourite expressions.