When you want to know if something is transparent to visible light or not, here is the mystery material and here is visible light.

当你想知道某物对可见光是否透明时，这里是神秘物质，这里是可见光。

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If you want something to be done, then their staff do not have so much incentive to help you because he is a worker for the government.

如果你想做点什么，他们的员工没有那么多动力来帮助你，因为他是政府的员工。

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This sentence pattern is great when you want to express regret for something that you perhaps did not do.

当你想表达对一些过去没做成的事情感到后悔时，你可以使用这个句型。

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Experts say a good rule to remember is not to post anything you would not want your mother to see.

VOA: special.2009.09.14

I wonder have any of you reflected on, I don't want to call it shadow side, is not domesticated.

不知道你们有没有人想过这个问题，我不想说这是自然的阴暗面，无法驯化的一面。

普林斯顿公开课 - 人性课程节选

This is great when you want to express regret for something that you perhaps did not do.

当你想表达对一些过去没做成的事情感到后悔时，你可以使用这个句型。

I should have 课堂 - SpeakingMax英语口语达人

But I want you -- I want you to understand, this is not about me. (Applause.) This is not about me.

WHITEHOUSE: "White House to Main Street" Town Hall: Elyria, OH

You have to see video of yourself speaking if you want to improve, and there is absolutely no excuse not to do so.

FORBES: Should I rehearse, and for how long? -Presentation Training

Apologies for my lack of posting over the last ten or so days but I started out with a cold the week before Christmas and wound up with pneumonia which, as you probably know, is not something you want to ignore.

FORBES: Your WiFi is (Possibly) No Longer Secure!