这种常“流”难“留”，给患者造成了很大的心理压力，影响了健康。

This often "flow" difficult "leave", to give patients caused great psychological pressure, the impact of the health.

youdao

在过去，这种转变过程常证明是艰难的。

In the past this process of transition has often proven difficult.

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然而很明显，学生常需要这种家庭支持，尤其是年纪比较小的学生。

However, it is clear that students, especially young students, often need this kind of home support.

youdao

If they have an underperforming fund, sometimes they allow it to die a dignified death; although, that doesn't happen very often.

如果他们旗下有一支表现不佳的基金,他们可能会让基金退市,当然这种情况不常发生

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And it's a really great experience. So that's pretty much what I associate Golden Gate Park with, for me.

节日办得很不错。特别是对我这种常在金门公园附近溜达的人，是一种很好的体验。

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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