日常英语场景30篇（4）
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Bike Tune-up: Gears, Brakes, and Tire Pressure
自行车维修：变速、刹车与胎压调试
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I roll my bike into the repair shop and say 'Hi'.我把自行车推进修理店，打了声招呼。
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The mechanic checks tire pressure with a small gauge tool.修车师傅用气压表检查轮胎气压。
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He shifts through all gears to test smooth clicking sounds.他逐档换挡，测试换挡是否顺滑清脆。
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He tightens the brake cables so levers feel firm.他拧紧刹车线，让刹把手感更扎实。
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He cleans the chain with a soft brush and adds oil.他用软刷清洁链条，并加注润滑油。
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He checks wheel alignment by spinning them slowly.他缓慢转动车轮，检查轮组是否对正。
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He writes down what he fixed on my service slip.他把维修项目写在了我的服务单上。
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I test ride slowly in the parking lot before going home.我先在停车场慢骑试车，再回家。