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These uncredited writers had to sign agreements never to admit their work.
VOA: special.2009.08.24
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No, we call that work positive work. All right, so that means we need to put a negative sign right here, by convention.
历史上有过不同的习惯，这里我们规定,如果环境对系统做功。
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This is a sign of my economic status: I don't have to work. It is middle and lower-class women who do not get to observe purdah in this way.
但这恰好是我经济地位的标志：,我不需要工作，只有中下阶层的女人,才像这样不遵守深闺的习俗。
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But his lawyer Anna Stavitskaya tells VOA that her client had little choice but to sign the document, since fighting for his freedom in court did not work.
VOA: standard.2010.07.09
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So you may take this course ultimately via pass-fail or letter grade and I am more than happy to chat with you about the implications and to sign any paper work such as the stack here that you might need.
你可能希望这门课采用及格-不及格分制或者分数制,我很乐意跟你聊下,两个打分制各自的含义,也可以帮你在这里签到。
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He goes on to say that even though Moscow is working on, and will sign a new treaty, the Kremlin will nevertheless work on the development of its strategic assault forces because Russia cannot protect itself without this.
VOA: standard.2009.12.25
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So, the system does work on the surroundings, hence the minus sign.
系统对环境做功，因此符号是负的。
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I'm going to put aside for the moment the question of sign languages and how they work.
我想暂时把手语,及其如何作用的问题先放到一边
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That's the crucial thing: if they're not willing, the use of the sign doesn't work, which confirms the idea that nothing can be changed simply by individual agency in and of itself.
这很关键：,如果他们自己不愿意使用，符号就没有意义，这也就应证了我们的观点,没有人能单独改变一个群体符号的使用方式。
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The sound is the sign of his work.
这声音是他劳动的信号。
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Convention, OK, this negative sign is just a pure convention. You just got to use it all the time. If you use an old textbook, written when I was taking thermodynamics, they have the opposite convention, and it's very confusing. But now we've all agreed on this convention, and work is going to be with the negative sign here.
系统对外界做功的符号为负,这就是我们,在本课中的规定，纯粹出于统一符号的需要，有些教科书中，可能会使用相反的符号规定,注意不要混淆了，这门课上,我们将一直使用。
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