Here's a way that you can do it in a test tube without using any cells by this process called Polymerase Chain Reaction.

但有一个方法可以让你在试管中完成,不用细胞,这个方法叫聚合酶链式反应

耶鲁公开课 - 生物医学工程探索课程节选

and improve the quality of human life to the extent possible without using animal testing.

以及提高人类的生活质量。

需要动物实验吗？ - SpeakingMax英语口语达人

You couldn't just run something successfully in a cycle and get work out of it, using the heat from the hot reservoir, without also converting some of the heat that came in to heat that would flow into a cold reservoir.

如果一样东西在循环工作过程中,只有热从高温热源中流出，而没有热流入低温热源，那么此过程,不可能对外做功,不可能把所有热。

麻省理工公开课 - 热力学与动力学课程节选

We have to understand the way in which what we do and say, what we write in our papers and articles, is grounded in theoretical premises which, if we don't come to terms with them, we will simply naively reproduce without being fully aware of how we're using them and how, indeed, they are using us.

我们所为，所说，和在论文中所写的内容，是以一些理论，为前提的，如果不接受这些理论，那我们就不过是天真地重复,根本不知道,我们是如何利用它们的。

耶鲁公开课 - 文学理论导论课程节选

to do sqrt, or square root-- no, I'm going to square root use sqrt, that's the name I'm using here-- square root a hundred different places in some piece of code. Without function, I'd have to copy that piece of code everywhere.

让我做一下准备,想象一下我要调用sqrt或者-,不，我会调用sqrt函数,这是我在这里用的名字，我得把这段代码到处复制。

麻省理工公开课 - 计算机科学及编程导论课程节选

In the next example, let's try using the "Do you ever" pattern without the sarcastic undertone.

在下一个例句中，“Do you ever”并不带挖苦的意思。

Do you ever课堂 - SpeakingMax英语口语达人