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1·The bridge is used infrequently.

这座桥很少有人用。《柯林斯英汉双解大词典》

2·This is a problem not infrequently encountered by postdocs.

这是一个博士后学生经常遇到的问题。《柯林斯英汉双解大词典》

3·You are more liable to injury if you exercise infrequently.

不经常运动就更容易受伤。《牛津词典》

4·How can scientists detect a particle that interacts so infrequently with other matter?

科学家们是如何探测到一种很少与其他物质相互起作用的粒子的呢？

5·Big opportunities come infrequently.

大机会可不常来。

6·Guys shouldn't give flowers too often or too infrequently.

男士送花不应该太频繁或太稀少。

7·The data changes infrequently relative to the request volume.

数据不经常地相对于请求容量发生变化。

8·He goes to the same cheap shop as I do, but very infrequently.

他和我去同一家便宜的理发店，不过他去的更少。

9·Certain tools are used commonly; others are used more infrequently.

一些工具非常常用，其他工具不太常用。

10·Even a review as infrequently as annually will do the trick, I believe.

我相信，即使是每年审视一次也是有用的。

不经常地

1·The data changes infrequently relative to the request volume.

数据不经常地相对于请求容量发生变化。