发电机的开启只在肌肉已经开始阻止摆腿的阶段。他不用夺走你走路的量使你慢下来。
The generator kicks in only during the swing phase of a footstep when the muscles are already braking, so it doesn’t take power away from your step and slow you down.
几十年来，物理学家们一直相信万有引力应该使宇宙的膨胀速度慢下来。
For decades physicists were convinced that gravity should be causing the expansion rate of the universe to slow.
而且，除非什么东西使我慢下来，我心无旁骛——路上的手推车或者我妻子总会在我的身后表示不满： “为什么我们不能慢慢走？”
And I don't notice anything except things that are slowing me down: prams that are in my way or people like my wife, trailing behind, whimpering, "Why can't we just stroll?
一根手指的弹击足够使一个气球加速离去，当气球运动时，一点动力，甚至空气的摩擦力可以很快使它慢下来。
The flick of a finger is enough to make a balloon accelerate away. When moving, it has little momentum and even the friction of the air quickly slows it up.
他们的反对使谈判进程放慢下来。
Their objections are slowing down the progress of the negotiations.
由于裂变物质的耗尽以及由于核心的膨胀，才使反应减慢下来。
The reaction is slowed by a combination of depletion of the fissionable material and expansion of the core.
尽管如此，这个战斗训练容易使人在练习中动作慢下来以及惊吓到马，因此不宜频繁使用，而且训练时一定要有军官做裁判。
And even with these precautions the exercise has such a tendency to make men slow up and to frighten horses that it should not be frequently indulged in, and never without an officer as judge.
尽管如此，这个战斗训练容易使人在练习中动作慢下来以及惊吓到马，因此不宜频繁使用，而且训练时一定要有军官做裁判。
And even with these precautions the exercise has such a tendency to make men slow up and to frighten horses that it should not be frequently indulged in, and never without an officer as judge.
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