carnk shaft的用法和樣例：
例句
- As the crankshaft rotates, the crankpin swings in a circle around the shaft.
隨著曲軸的轉動，曲柄銷繞主軸作圓周擺動。 - The former causes forced vibration at the circular frequency of the crank shaft and the latter causes transient vibration at the natural frequency of the press.
慣性力激發的振動是以曲軸轉速為頻率的強迫振動，加工力激發的是以壓機固有頻率為頻率的過渡振動。
