But if he will drive right at it, his wagon wheels press the springs below the roadway, and the gate swings back to let him through.
但是如果我们向前走去,门上的机轮经了人体的推动,就会向左转动;
In the early years of the 19th century, farmers in western Pennsylvania kept their wagon wheels greased with puddles of bubbling muck that studded the countryside.
在19世纪早期,西部宾夕法尼亚州的农民都给自己的马车轮子抹上乡下随处可见的气泡肥料胶土。
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