No, because nothing is actually crossing the surface of the moon - the dot isn't an actual object, it is just a series of photons in the laser beam hitting the surface.

其实不是这样，这是因为此时并没有什么实际的东西真正地横跨了月球的表面-亮点不是一个实体，它仅仅是击中月球表面激光束里一系列的光子。

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The lining structure of the Yellow River crossing tunnel is analyzed, the results of the beam and non linear spring model are compared with those of other models.

应用梁非线性弹簧模型对穿越黄河隧道一次衬砌结构的受力进行了分析。

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The practical construction results show that the computation theory of this rails beam is credible and this rails beam is a good method to enhance rail's span in the crossing site.

理论计算及工程实践表明本连续梁式架空轨束梁的设计计算方法可靠，连续梁架空方式是提高轨束梁架空跨度的有效方法。

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