That's one of the beauties of proteins as working molecules is that their structure can be changed by subtle means.

蛋白质作为一种生物活性分子,其优势之一是,能够通过精细的方法改变其结构

耶鲁公开课 - 生物医学工程探索课程节选

The "I'm sure that" pattern can be changed slightly to express several different things.

I'm sure that"句型可以通过稍作变形，来表达几类不同的事情。

I'm sure 课堂 - SpeakingMax英语口语达人

That's the crucial thing: if they're not willing, the use of the sign doesn't work, which confirms the idea that nothing can be changed simply by individual agency in and of itself.

这很关键：,如果他们自己不愿意使用，符号就没有意义，这也就应证了我们的观点,没有人能单独改变一个群体符号的使用方式。

耶鲁公开课 - 文学理论导论课程节选

I just want to flag the thought that you can be the very same hunk of stuff, even if some of the constituent atoms have changed along the way.

我只是要树立这样一个观点,就算在过程中，改变了一些原子,还能是同一件物品。

耶鲁公开课 - 死亡课程节选