We need to innovate. We need to have more value-added things in the Chinese economy or in the GDP composition.

中国需要创新,需要更多高附加值的产品。

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That great deal of specificity implies that heat is also path-dependent and again we have the convention that if heat is added to the system, the quantity is greater than zero.

热也是与路径有关的,根据通常的习惯,如果我们对系统加热，其符号取为正。

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Well, what we now call the black notes-- although historically keyboards could be either way-- you could have these added notes black or white and then these underneath would be black.

我们现在称之为黑色音符,尽管历史上键盘的颜色换成怎样都行,也许增加的音符是白色,而底下的这些音符则是黑色

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