We may vary the limit at our discretion and will notify you of any change.

我们可酌情决定更改限制，并会将任何变更通知你。

《柯林斯英汉双解大词典》

These opinions will change with time, and vary from place to place.

这些观点会根据时间和地点的不同而改变。

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The statuses we assume often vary with the people we encounter, and change through life.

我们采取的身份是随着接触的人的不同而改变，且一生都在变化。

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When you vary time a little bit and ask, "How does R change?"

当你把时间改变一个微元,然后问,"位矢 R 会怎样变化"

耶鲁公开课 - 基础物理课程节选

Clearly attitudes to the natural world change over time - and vary between regions.

BBC: Why such a fuss about extinction?

Product design specifications and colors are subject to change without notice and may vary from those shown.

ENGADGET: Samsung outs new Series 5 550P notebook in the UK, Ivy Bridge and numeric keypad onboard

The bank is likely to change its predictions frequently as economic circumstances vary.

BBC: US Federal Reserve to publish interest rate projections