一旦它进入土壤，植物会通过根部将它吸收。

Once it's in the soil, plants absorb it through their roots.

youdao

一旦它碰到装置就会毙命。

Once it touched the installation, it would die.

youdao

一旦它成为负担，它立刻会被出售。

Once it became a burden, it needed to be hustled off the estate.

youdao

So it's a really powerful and simple formalism, once we set up what is needed the go through it, right?

因此这是一种很强大而简单的形式,一旦我们定下需要什么,就可以推导出它，对吧？

麻省理工公开课 - 热力学与动力学课程节选

So once we cover it, it will then be fair game to ask these photoelectron spectroscopy or these photoelectric effect questions using the wavelength of the electron.

所以一旦我们涉及到它，问及光电子能谱或者,用电子的波长问及,光电效应是一样的。

麻省理工公开课 - 化学原理课程节选

If you make Jell-o and you make it right, then once it's set or gelled, it has mechanical properties.

如果你用正确方法做出了吉露果冻,它一旦凉下来定了型,就有了机械性能

耶鲁公开课 - 生物医学工程探索课程节选