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1. The car's engineis broken, and we need to replacethe breaker arm adjusting screw.
汽车发动机坏了，我们需要更换断臂调节螺丝。
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2. The mechanic replaced the breaker armadjusting screw with a new one.
机械师用一个新的替换了断臂调节螺丝。
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3. The technician carefully adjusted the screw toensure proper function of the brake system.
技术员仔细调整螺丝，确保刹车系统的正常工作。