I am using dS rather than dA because I still want to think of dA as maybe the area in one of the coordinate planes like the one we had in double integrals. You will see later where this comes in.
这里使用dS而不是dA，因为我习惯把dA看成是，坐标平面中的面积元，就像在二重积分中所做的那样，待会大家会了解。
So, for example, the area of region is the double integral of just dA, 1dA or if it helps you, one dA if you want.
举个例子，区域R的面积是dA的二重积分，便于理解，在这里写成。
Wayne, I know that you are not agree with Da-Shung Army. However, would you mind to do one more case fore them?
威因，我知道你心底不太能认同大顺军，可是你愿意看在我的面子上，再替他们办件事吗？
Finally we take a look at the red squirrel, one of Britain's best loved wild creatures. Thank you for watching Da Ai Headlines. Goodbye.
最后，一起来看看英国一种可爱的野生动物「红松鼠」的可爱画面，感恩收看，再会。
The second one is basic-point evidence preposition. Common semantic characteristic is +evidence+basic-piont, including"ju, genju, yiju, ben, benzhe, jiyu, jianyu, cong, da, you".
二是基点类凭据性介词，共同特点是具有+凭据性+基点的语义特征，有“据、根据、依据、本、本着、基于、鉴于、从、打、由”共十个。
The second one is basic-point evidence preposition. Common semantic characteristic is +evidence+basic-piont, including"ju, genju, yiju, ben, benzhe, jiyu, jianyu, cong, da, you".
二是基点类凭据性介词，共同特点是具有+凭据性+基点的语义特征，有“据、根据、依据、本、本着、基于、鉴于、从、打、由”共十个。
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