They are usually less efficient than parallel-shaft gears, however, because of an additional sliding movement along the teeth.

他们通常效率较低，比平行轴齿轮，不过，由于一个额外滑运动，沿牙齿。

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The peculiar aspect is the sliding movement of the roof that offers radically variable space, extent of shelter, sunlight and insulation.

屋顶的设计非常独特，能轻微滑动，提供一个完全可变空间，可以房屋免受阳光直射和岁月的侵蚀。

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Control port 12 or 14 of the compressed pulse can be only one column so that sliding movement, but the 12 and 14 can not both be a signal.

控制口12口或14口的压缩空气只需一个脉冲信号即可使滑柱移动，但12口和14口不能同时有信号。

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Now a further four properties are at risk of sliding into the sea after fresh movement.

BBC: Properties at Knipe Point, Scarborough

Convenient access to the rear seats is assured by sliding second-row seats that can be managed with a single hand movement.

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