一定

tā yī dìng lái

她一定来。

She is sure to come.

zhè yàng zuò yī dìng huì fàn cuò wù

这样做一定会犯错误。

Doing it this way will lead to mistakes.

zhè yī dìng shì tā shuō de

这一定是她说的。

It must have been her who said this.

tā bàn tiān hái bù huí lái yī dìng shì méi dā dào chē

他半天还不回来，一定是没搭到车。

He must have missed the train, not to have come back yet all this time.

wén zhāng de shēn qiǎn gēn piān fú de cháng duǎn méi yǒu yī dìng de guān xi

文章的深浅跟篇幅的长短，没有一定的关系。

The depth of an article is not necessarily associated with its length.

zhè liǎng jiàn shì zhī jiān méi yǒu yī dìng de lián xì

这两件事之间没有一定的联系。

There is no definite connection between the two events.

liǎng qǐ àn jiàn cún zài yī dìng de guān lián xìng

两起案件存在一定的关联性。

There is some correlation between the two cases.

yī dìng de wēn dù

一定的温度

at a constant temperature

zhè lǐ yǒu yī dìng de chéng xù

这里有一定的程序。

There is a definite order to how this should be done.

měi tiān gōng zuò jǐ xiǎo shí dōu shì yī dìng de

每天工作几小时都是一定的。

There are fixed hours for a day's work.

tā yī máng qi lai chī fàn shuì jiào dōu méi yǒu yī dìng de shí jiān le

她一忙起来，吃饭睡觉都没有一定的时间了。

When she gets really busy, she doesn't keep regular hours for eating or sleeping.

tā shàng bān shí jiān bù yī dìng

她上班时间不一定。

She doesn't keep regular office hours.

zài yī dìng de lì shǐ shí qī

在一定的历史时期

at a given point in history

zài yī dìng de qíng kuàng xia

在一定的情况下

in a given situation

zài yī dìng chéng dù xia

在一定程度下

to a certain degree

měi zhǒng tán huáng dōu yǒu yī dìng de tán xìng

每种弹簧都有一定的弹性。

Every sort of spring has a definite elasticity.

dé dào yī dìng de shōu huò

得到一定的收获

have certain rewards

dào le yī dìng de nián jì

到了一定的年纪

reach a certain age

xū yào yī dìng liàng de dà qǐ yè

需要一定量的大企业

need a certain amount of large enterprise

yǐ jīng cǎi qǔ yī dìng de cuò shī

已经采取一定的措施

have taken certain measures