她常一整天在街头的各个角落闲逛。

She would spend the day hanging around street corners.

《柯林斯英汉双解大词典》

我们应该更常一点相聚在一起吃午饭。

We should meet for lunch more often.

《牛津词典》

房间里的镜子常给人一种空间增大的错觉。

Mirrors in a room often give an illusion of space.

《牛津词典》

And I wanted to do it a different way which is a little bit convoluted, but it introduces the idea of a thermodynamic cycle, and it's something that we're going to use a lot in the class.

现在我将用另一种,有些复杂的办法来推导这一关系，在这一过程中引入,我们今后会常接触到的,热力学循环的概念。

麻省理工公开课 - 热力学与动力学课程节选

And finally, we often think of a set of materials for teaching, there's a set of lectures notes that we hand out to students, for example.

最后，我们常想有一堆材料,来教学，比如我们,常常发给学生的讲义。

麻省理工公开课 - 媒体、教育、市场课程节选

This is commonly used in the immune system as well, but it's a way of amplifying a signal.

免疫系统也常使用这种方法,但这主要是一种放大信号的方式

耶鲁公开课 - 生物医学工程探索课程节选