Adherents of this line of thought have criticized my recent study of Lenin's What is to Be Done?, and I confess this criticism was one motive for undertaking the necessary research.

持此意见者批评了我近来所做的关于列宁著作《怎么办》的研究，我承认这些批评是我持续进行相关研究的动力之一。

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So, one of them says the line integral for the work done by a vector field along a closed curve counterclockwise is equal to the double integral of a curl of a field over the enclosed region.

其中一种说明了，在向量场上，沿逆时针方向，向量做的功等于，平面区域上旋度F的二重积分。

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More than one in seven households relies entirely on mobiles and has done away with a fixed line for making calls.

超过七分之一的家庭完全依赖于手机，已经不用固定线路拨打电话了。

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Apple rival Hewlett-Packard has done well with its line of TouchSmart all-in-one consumer PCs, which supplement a mouse with a touch-sensitive screen.

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One example is his own line of underwear, David Beckham Bodywear, which launches in February and is done in conjunction with 19 Entertainment.

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