So, instead of setting up the integral with bounds and integrating dx dy or dy dx or in polar coordinates, I'm just going to say, well, let's remember the definition of a center of mass.
那么我们将不会建立带上下限的积分，和积分dx,dy, dy, dx或者在极坐标做线积分，需要说，让我们回忆一下质心的定义。
Well, we can do that in rectangular coordinates dz dx dy where dV becomes something like, maybe, dz dx dy, or any permutation of these.
我们在直角坐标系中处理，在这里dV有可能变成，或者它们的其他排列。
For instance, despite its glass, the 9.7-inch Kindle DX is about 27 percent lighter than the similar sized iPad: The Kindle DX weights 1.1 lbs compared to the iPad’s 1.5 lbs.
例如，即便是玻璃材质，9.7英寸的KindleDX也比同尺寸的iPad轻约27%：Kindle DX重1.1磅而iPad重1.5磅。
Based on the contrastive experimental data between DX piles and equal-diameter piles at the same sites all over the country, this paper has a study on the bearing behaviors of DX piles.
基于全国各地的同场地挤扩支盘桩和等直径桩的对比试验资料，对挤扩支盘桩的承载性能进行了分析。
The results show that the tension bearing capacity of DX pile is apparently higher than that of the pile with constant section, and the curve of load-displacement of DX pile is slowly varying.
结果表明，DX桩的抗拔承载力明显大于同等条件下的等截面桩，且DX桩的荷载-上拔位移关系呈缓变形；
This mode is used to set the film speed for non-DX films, or to set a different film speed than that specified for DX-coded films.
这种模式也可用于设置非d X型胶卷，或设置非d X型胶卷规定的不同胶卷速度。
This mode is used to set the film speed for non-DX films, or to set a different film speed than that specified for DX-coded films.
这种模式也可用于设置非d X型胶卷，或设置非d X型胶卷规定的不同胶卷速度。
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