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1. The car's crankshaft ratchet is loose, causing the engine to misfire.
汽车的曲轴调节器松动了，导致发动机熄火。
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2. The mechanic replaced the crankshaft ratchet with a new one after the accident.
事故后，技师用一个新的曲轴调节器替换了旧的。
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3. The old car had a crankshaft ratchet that was difficult to turn, making it hard to start the engine.
这辆旧车有一个难以转动的曲轴调节器，使得启动发动机变得困难。