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1·The need for sleep varies considerably from person to person.

不同的人对睡眠的需要差异相当大。《牛津词典》

2·Acceptance of women preachers varies greatly from denomination to denomination.

对于女性牧师的接受，各教派差异很大。《柯林斯英汉双解大词典》

3·Even within the tropics, language diversity varies widely.

即使在热带地区，语言的多样性也有很大的差异。

4·The price varies a lot in different places, but generally it's OK.

不同地方价钱差异很大，但总体来说还能接受。

5·The level of skill possessed by the local workforce varies with location.

当地劳动力所拥有的技能水平因地点而异。

6·The shape of this orbit isn't consistent; it varies over time, over a period of about a thousand years.

轨道的形状并不是始终如一的；它会随时间变化，变化周期为一百年左右。

7·The length of time of which the eyes stop—the duration of the fixation—varies considerably from person to person.

眼睛停留的时间，即注视的持续时间，因人而异。

8·The menu varies with the season.

菜单随季节而变动。《牛津词典》

9·The text varies from the earlier versions.

这一文本有别于那些早期的版本。《柯林斯英汉双解大词典》

10·As they're handmade, each one varies slightly.

由于它们是手工制作的，每一件都会略有不同。《柯林斯英汉双解大词典》

改变

1·Or perhaps the service broker would encapsulate business logic that varies the selection of service providers based on established service level agreements or business rules.

或者，服务代理可以封装业务逻辑，以根据已建立的服务级别协议或业务规则改变服务提供者的选择。

2·The security always varies its route.

保安车常常改变路线。

3·The special course orientation requires that history teaching varies the traditional history teaching concept-to teach under the notion of competence standard.

高职创意类专业历史课课程定位要求历史教学改变传统的历史教学观，在职业教育的“能力本位”理念下开展教学。

4·Now what happens is the audio signal varies the power that's going to the laser so that its brightness changes.

现在是音频信号改变传输到激光的功率从而使其亮度发生变化。

(1)varies as与…成比例