This leads us to the first key of being a successful public speaker: talk about something you know about.
这就为我们引出了成为一个成功的公众演说家的第一个秘诀：谈论你知道的事情。
Take notes for practice tests. When you read something you know will show up on a test, write it down in the form of a question.
当读到一些你认为会在考试中出现的知识点时，把它以问题的形式记下来。
Two-factor systems rely not just on something you know, however, but also on something you have, such as an electronic token, or something you are, in the form of a biometric.
要通过“双重认证系统”，不仅需要你提供你所知道的信息，而且还需要你携带的东西（比如某种电子信物），或者你身体的某部分（以生物识别形式）。
A Groupon is also a commitment device: it's a way of forcing yourself to do something you really want to try at some point, but something you know you might otherwise never get around to.
团购同时是一种承诺工具：它会迫使你尝试那些心中觊觎、但可能永远不会去尝试的东西。
If that's not possible or not something you know, then make sure you bubble up an exception with helpful information so that calling programs can (hopefully) make similar smart decisions.
如果这些信息您并不知道，那么确保抛出一个提供有用信息的异常，以便调用程序能够(但愿)做出类似的智能决策。
Gretchen: What's something you know now about happiness that you didn't know when you were 18 years old?
关于快乐，哪些是你现在知道而在你18岁时不知道的？
It's hard to wait around for something you know might never happen; but it's even harder to give up when you know it's everything you want.
明明知道也许根本不可能，还是去等，这很难：但是更难的是，当你知道它是你的全部，却必须放弃它。
If you see something you know your colleague will absolutely love, a book about a topic in which he's interested for example, get it for him.
如果你看到了同事肯定喜欢的东西，比如一本讲述了对方钟爱话题的书籍，那就带给对方吧。
Compared to something you possess or something you know, these characters are inherently secure for they are unique in you and hard to be forged.
与人所持有的证件和所拥有的知识相比，生物特征具有与生俱来的唯一性和安全性。
Whether you ate something you know you shouldn't have, said something hurtful that you wish you could take back or made a mistake on the job, don't live in the past.
不论是吃了不该吃的东西、说了不该说的狠话，还是犯了不该犯的工作错误，既然事情已经过去，就不要再耿耿于怀。
Groupon is also a commitment device: it's a way of forcing yourself to do something you really want to try at some point, but something you know you might otherwise never get around to.
团购同时是一种承诺工具：它会迫使你尝试那些心中觊觎、但可能永远不会去尝试的东西。
Something you know that is of immense importance - something that will change the world when you finally say it.
一些至关重要的事，你自己也知道，如果你最终说出来就会改变这个世界。
If your boss gives you sincere accolades for your work on something, you know they mean it.
如果你的老板因你的工作表现而真心称赞你，你知道他们是认真的。
They're always worried their child's going to get hurt or something, you know, or they just are just over– protective, I guess yeah.
托德：他们一直担心孩子会受伤，我想这种家长对孩子有些过度保护了。
I was here 15 years ago or something. You know, I had no idea what I was doing.
大概15年前我来过这里，当时我完全不知所云。
I was here 15 years ago or something. You know, I had no idea what I was doing.
大概15年前我来过这里，当时我完全不知所云。
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