关于二手烟草烟雾，不存在安全接触水平。

There is no safe level of exposure to second-hand tobacco smoke.

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是一种全接触型的运动，因此还蛮难的。

It's a full-contact sport, so it's pretty rough.

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整个组件本体长度与线路板表面完全接触。

The entire body length of the component is in contact with the board surface.

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另一项非常重要的措施是使用完全接触的鞋垫或鞋。

Another important measure is to prescribe a total contact insole or shoe.

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另一项非常重要的措施是使用完全接触的鞋垫或鞋。

Another important measure is to prescribe a total contact insole or shoe.

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