在做白内障手术之前，您可能须要作如下准备。

To prepare for your cataract surgery, you may be asked to.

youdao

他说“做心脏手术之前，我觉得我战无不胜。”

Before his heart attack, he said, “I thought I was invincible.”

youdao

手术之前，患者会吸入这些混合着氧气或一氧化二氮的麻醉气体。

Before a procedure, patients inhale these gasses, which are mixed with either oxygen or nitrous oxide.

youdao

So two different kinds of strategies, one is a surgical strategy, actually removing tissue and we talked a little bit about the engineering of surgical instruments and things like - so there's a lot of Biomedical Engineering that goes into everything that happens in the operating room.

这是两种不同的方法,其中之一是通过手术,切除组织,之前我们讲过的手术器械工程学,这涉及到许多生物医学工程学原理,它已经渗透到手术室内的方方面面

耶鲁公开课 - 生物医学工程探索课程节选