They said, 'Come in, sit down, blah, blah, blah, sign here'.
他们说:“进来,坐下,干这个,干那个,在这里签字。”
请您在这里签个名好吗?
A Thank you. Can you sign here, please?
A谢谢你。请你在这里签名,好吗?
Also left forever on the moon is a sign with these words: "Here men from the planet Earth first set foot on the Moon July,nineteen sixty-nine A.D.
VOA: special.2009.07.15
And I've reversed the fraction here because of the negative sign here.
我交换了分子和分母,因为这里有个负号。
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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