Spring tendons enhance the foot’s efficiency: some of the energy spent to drop one’s weight down when taking a step is actually stored and then returned to the leg as it rebounds.

人们走路每迈出一步，重量落下时所输出的一部分能量，事实上被脚弓存储起来，然后被脚弓弹起，这部分能量就又返回到腿部。

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All other things being equal, when the ball receives a jolt of energy, it is more likely to drop down a step than to pop up one.

在所有其它因素不变的情况下，当球受到能量的撞击后，它滚下一个台阶的概率要大于跳上一个台阶。

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These products are drag and drop, and should be used as the last step before you upload your page (the files are harder to read after many of the returns are removed).

这些产品支持拖拽，并且需要在你上传页面之前使用(这些文件在许多换行符被删除后难以阅读)。

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Pervez Musharraf to step down as head of the army and drop corruption charges against her so she can return from exile and contest parliamentary elections.

NPR: Bhutto Stakes Her Future on Power-Sharing Deal

Banks fail because they either run out of capital to support their ongoing operations, their asset values drop below that of their liabilities, or fraud forces regulators to step in and take over.

FORBES: Is Your Bank At Risk Of Failure?

If you do not have time for a meal, step in for a martini or Manhattan at the long bar and watch the parade of high society drop in for dinner.

BBC: Business trip: New York City