I am sure you all know from physics class about how light moves in microscopic ways and that we can only see light when the wavelength of that light is in a specific range.

我相信，你们在物理课上都学过光是如何以微观的方式运动的，以及只有在光的波长在特定的范围内时我们才能看到光这一事实。

youdao

If you do not know how to start eating healthy and you need help keeping your grocery budget under control - I am sure you will like this handbook as much as I did.

如果你不知道如何开始吃得健康，并且需要一些控制采购预算的帮助——我相信你会跟我一样喜欢这本手册的。

youdao

And, if you plug the two curves together - Well, I am not really sure if I know how to plot this correctly.

如果将两条曲线相连，我不太知道如何准确画出这条曲线。

youdao

As I have noted many times in this column, the GOP has a serious demographic problem and I am not sure they know how to address it sufficiently.

FORBES: The Democrats' Moment of Truth

And me, I am especially worried about how to make sure the limes on my newly planted lime-tree grow, because I sure won't be buying them in a supermarket any time soon.

BBC: Australia: Where the good life comes at a price

Those eleven players in green know how much the people back home wants the team to do well and I am sure they are trying their best.

BBC: Have Your Say on Bangladesh