环境也存在危险因素，不仅仅简单地以危险工的作这样明显的形式存在，同样也以被称为“新奇”的具有横截特征的形式存在。

Situations also present risk factors, not simply in the obvious form of dangerous jobs but also in the form of a cross-cutting feature described as "newness."

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文中还证明了这一非横截交点恰好对应于静态分岔点即电压崩溃的临界点。文中结果对于防止电压崩溃、保证系统安全运行具有重要意义。

In the meantime, it is also proven that the non transversal intersection mentioned above exactly corresponds to the static bifurcation point, i. e. the critical point of voltage collapse.

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非双曲线型非线性系统同宿切面点和同宿横截点的存在，使得其时间序列的去噪或轨迹重影变得十分困难。

The presence of homoclinic tangencies and homoclinic intersection makes it difficult if not impossible, to denoise or shadow the trajectory of a non-hyperbolic nonlinear system.

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B is the assumed cross-section of the nucleus.

假定B是核的横截面积。

麻省理工公开课 - 固态化学导论课程节选

So, the number of nuclei, 119 if we were to sit and count these as well, is 119. So, we'll multiply that by just pi, r squared, to get that cross-section, and divide all of that by 1 . 39 meters squared.

如果你们数的话，原子核的数是，我们用它乘以πr的平方，得到横截面积，除以1。39平方米。

麻省理工公开课 - 化学原理课程节选