实验测得的后退速度的温度关系可用真空电弧后退运动的正离子喷流模型加以解释。
The experimentally measured temperature dependence of retrograde velocity of vacuum arcs can be explained by the ion jet model for retrograde motion of vacuum arcs.
记得上次在课结尾时我们，尝试计算接近最低点的运动，它看上去似乎静止及后退的趋势。
Remember last time at the end of class we were trying to figure out what exactly happens near the bottom point, when we have this motion that seems to stop and go backwards.
这就是这一建筑作品的从入口开始的全部工作方式，在“前进”与“后退”之间微妙的双重运动中展开。
That is how the building works, from the entrance onwards, in a subtle two-fold movement of advance and retreat.
但是我想后退一步了解一下，这些或那些运动——其中一些和艺术有关，一些和艺术无关，将你们的博览会与他人的区分开。
But I would like to take a step back and ask how these and other moves-some art-like, some no-set your fair apart from others.
人群后退让运动员们通过。
本次工作所发现的弧后大陆边缘伸展方向和大洋板块运动方向相吻合，支持弧后拉张机制应为板片后退模式。
The coupling relation between the directions of the overriding plate extension and oceanic plate motion supports the slab rollback model for the back-arc extension.
只见第一个运动员，他往后退了一步，一个帅气的动作，然后正对着横杆冲过去，加速冲刺，一个轻快有力的起跑，脚一踮，身体腾空起来，过去了。 。
See the first athlete, he took a step back, a handsome action, and facing the lever blunt past, spurt, a strong start, light foot stand, lift up body, in the past.
运动战的特点之一，是其流动性，不但许可而且要求野战军的大踏步的前进和后退。
One of the characteristics of mobile warfare is fluidity, which not only permits but requires a field army to advance and to withdraw in great strides.
运动战的特点之一，是其流动性，不但许可而且要求野战军的大踏步的前进和后退。
One of the characteristics of mobile warfare is fluidity, which not only permits but requires a field army to advance and to withdraw in great strides.
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