And, the area element in uv coordinates, let me call that dA prime just to make it look different.
然后，在uv坐标系内，把面积元素定义为dA，只是为了让他们看起来不同。
Over in Germany, where it had been popular before the war, Coke had just celebrated a triumphant return under the slogan: "Coca-Cola 1st Wieder Da!" (Coca-Cola Is Back!)
而在德国，战争前它一直受欢迎的，可口可乐刚刚用一句口号庆祝了它的胜利回归：“Coca - Cola 1stWiederDa ！(可口可乐又回来了！)”
"There is a da Vinci code - it is just not the one made popular by Dan Brown," she said.
她称：“‘达·芬奇密码’的确存在——但并非是那个由于丹·布朗(Dan Brown)而为人们所熟知的‘达·芬奇密码’。”
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。
Rock is the type of music that I like I just went to a rock concert two months ago. It was da-bomb.
摇滚乐是我喜欢的那一种音乐，我两个月前才去了摇滚乐的演唱会，那真是棒极了。
Rock is the type of music that I like I just went to a rock concert two months ago. It was da-bomb.
摇滚乐是我喜欢的那一种音乐，我两个月前才去了摇滚乐的演唱会，那真是棒极了。
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