首先介绍了雷达的工作原理、分析了低重频雷达测速原理及存在的问题。

Firstly, we come up with the principle of the radar x the problem and principle of velocity measurement with low-PRP radar.

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这些食物会帮助你减重，因为它们加入了卡路里但同时是低卡路里。

These foods help you lose weight because they\'re filling but low in calories.

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那些老换工作、跳来跳去，没有明显进步的人，长寿的概率——比其担子日重的人——要低。

Those who moved from job to job without a clear progression were less likely to have long lives than those with increasing responsibilities.

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