第四章：关于带有时滞的飞机纵向运动问题。

Chapter four: on the plane vertical motion with delay.

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考虑横观各向同性压电材料中螺位错的亚音速运动问题。

The moving problem of a screw dislocation at subsonic velocity in a transversely isotropic piezoelectric medium is considered.

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利用半解析单元法将顶管施工中三维土运动问题转化成一维数值计算。

By making use of the semi analytical element method, the three dimensional soil movements problem of pipe jacking is transfered to a one dimensional numerical calculation.

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Another big question that came up particularly starting in the 70s, women's movement. But in the 80s and into the 90s was a movement called "women's rights are human rights".

另一个重要问题就是,从70年代开始的女权运动,但是，在八九十年代时，另一场运动发展起来,叫做，“女权即人权“

普林斯顿公开课 - 人性课程节选

You reduce a lot of the health risks, if you exercise often.

如果你经常运动的话，它会帮你降低许多健康问题的风险。

It's important 实战 - SpeakingMax英语口语达人

Then next week we'll do more complicated problems that involve motion in higher dimensions, how to go to two dimensions or three dimensions.

下周我们将会处理更复杂的问题,包括更高维数的物体运动,如何处理二维以及三维运动

耶鲁公开课 - 基础物理课程节选