在购买食物时，你有一定的法定权利。

When you buy foods you have certain statutory rights.

《牛津词典》

他的话是有一定根据的。

There is some substance in what he says.

《牛津词典》

这种方法有一定的新意。

There's a certain novelty value in this approach.

《牛津词典》

It's going to have some volume, temperature to begin with, and then we're going to do something to it.

气体有一定的，体积与温度，现在我们。

麻省理工公开课 - 热力学与动力学课程节选

But it's something that if you learn enough about it, and you'll be able to find the rhythm

但当你学到足够多的时候，你会有一定的语感，

英语为什么这么难呢？ - SpeakingMax英语口语达人

It's a scheme that in English counts accents or stresses per line and then arranges them in a pattern.

这种体系里的英文诗每行都有重读,然后将他们按一定模式排列。

耶鲁公开课 - 现代诗歌课程节选