同根派生 英汉例句The camshaft has a cam, on which there is a lob, or bump.凸轮轴上有一个凸轮，凸轮上有一个凸角。The metal shaft, called the camshaft, typically has individual cams for each valve in the engine.那金属轴叫凸轮轴，在发动机里的每个气门一般有各自的凸轮。