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According to safety experts, it is advisable to accommodate yourself on ground floors so as to escape quickly in case of a fire.

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在动力传动中，从增加传动均匀性和减少动载荷考虑，小链轮齿数宜适当多些。

In western dining seating arrangements, the highest ranking male generally sits to the left of the hostess.

链传动属于形闭合型传动，但与齿轮传动不同，其瞬时传动比是变化的。

由太阳到行星的矢径在相等的时间间隔内扫过的面积不等。