Under some conditions, snowflakes can form that are five centimeters long.

VOA: special.2010.01.05

You can still calculate the heat that's released. This is what will tell you under some particular conditions what will actually happen. Where will you end up.

你仍然可以计算放热,在特定条件这些下这些物理量,能告诉我们将会发生的事情。

麻省理工公开课 - 热力学与动力学课程节选

And I didn't specify the conditions, but if we were to do this under ordinary chemical conditions of some, you'd say room temperature and pressure, right, they all happen spontaneously.

我并没有特别说明反应条件，但是如果我们在通常的化学条件下,实现这些化学反应，比如在室温和大气压下下，他们都是自发的。

麻省理工公开课 - 热力学与动力学课程节选

Those were really tough tours. They were kept out very often for up to three months, under some pretty grueling conditions.

VOA: special.2010.06.21

Some are going to reform and some are going to reform with the gene in, and some probably aren't going to reseal at all under the conditions that I've used.

有些质粒会自己合上,有些质粒会与DNA片段重组并合上,还有的在我提供的条件下,也根本合不上

耶鲁公开课 - 生物医学工程探索课程节选

Mr.Hopkins and his crew filmed the doctors working under some of the most extreme and dangerous conditions imaginable.

VOA: special.2010.07.26

The native structure is this double stranded structure here and if I heat it up slightly and I add some base, so under slightly basic conditions, these molecules will fall apart because you've created conditions where the hydrogen bonding is no longer favorable so they peel apart.

原始结构,在这里就是指DNA双链,如果我稍微加热,并且加入一些碱,在弱碱性的条件下,这些配对碱基会分开,这是因为在一定条件下,碱基对之间的氢键,不再稳定并且会断裂分开

耶鲁公开课 - 生物医学工程探索课程节选