... 我对英语充满了翻译公司 » My English is full of passion 滑滑梯 » Sliding down slides 你是卫华吗？ » Weihua you do? ...
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In crosshead-type engines, the piston fastens to a vertical piston rod whose lower end is attached to a sliding member called a crosshead, which slides up an down in guides.
在十字头型发动机中，活塞连接在一根垂直的活塞杆上，活塞杆的下端又连接在一个叫做十字头的滑动构件上，十字头在导轨中上下滑动。
When they slide, they seem to be sliding down invisible slides way up in the air.
滑翔时它们在空中似乎时隐时现。
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