动辄的英文：
be apt to
be liable to
tend to

Dinah angers easily.
黛娜动辄生气

He is swift to take offence.
他动辄生别人的气。

So is the propensity to strike over seemingly minor matters
为了一些看起来细小的事情，动辄罢工，原因也在这里。

Local politicians are quick to pounce on any trouble.
地方上的那些政客们动辄抓住问题不放。

The blustering man was ready enough with threats, but when it came to the point of carrying them out he got cold feet
这个狂暴之徒动辄就是威胁，但临付诸行动时，他又畏缩了。

Whatever gentlemen are apt to admire in women, Mrs. Yorke condemned; and what they overlook or despise, she patronized
凡是男人对女人动辄加以赞美之处，无不遭到约克太太的谴责;凡是他们所忽视的或不屑一看的，无不获得她的庇护。

A man apt to promise is apt to forget
轻诺者,信必寡

He is apt at languages.
他善于学习语言。

In many ways the comparison is apt.
在诸多方面，这个对比是恰当的。

You are liable for all damage.
你应负赔偿一切损坏的责任。

Every man is liable to error.
人人都可能犯错误。

The person makes a guarantee is secondarily liable if the person who is primarily liable defaults.
如果主要承担债务责任的人不履约，作担保的人就是次要债务责任承担人。

He tends to talk large.
他喜欢讲大话。

The interests of seniors tend to be . . . varied
老年人的兴趣倾向于…多彩的。

This phrase tends to become obsolete.
这个短语已渐渐成为废词。