为了正确愈合，需要闭合的伤口通常用缝针缝合。

Cuts that need to be held closed in order to heal properly have generally been held closed with stitches.

youdao

先从这到这，然后回来，这是闭合的。

If I go first from here to here, and then back along that one, I get a closed path.

youdao

这种方式通常被描述为一个闭合的循环系统。

The way it's usually depicted is as a closed circulatory system.

youdao

A state where it's closed, so imagine a channel with a lid on top of it; when it's closed nothing can go through the channel, when it's open then things can go through.

一种是闭合状态,想想一个有盖子的通道吧,当盖子合上的时候任何东西都不能通过,而打开时就畅通无阻

耶鲁公开课 - 生物医学工程探索课程节选

The answer is it will want to reform with itself, and if I have these in solution then how many reform with itself and how many reform with the molecule I'm interested probably depends on the relative concentrations of both in the solution and what conditions I have it at.

答案是质粒有可能会自己闭合,如果质粒和我感兴趣的DNA片段,都在溶液里那有多少质粒会自己合上,有多少与我感兴趣的DNA重组呢,这大概取决于两者在溶液里的相对浓度,和我让溶液处在什么条件下

耶鲁公开课 - 生物医学工程探索课程节选