Regular car maintenance, such as oil changes, is necessary if you want your vehicle to run well.
若要让汽车正常运行，像更换机油等定期维护是绝对必要的。
The reasonable load of vehicle to the bridge load-bearing security, the path transportation security as well as the road maintenance and so on, is very important.
合理的车辆载荷对桥梁承重安全、道路运输安全以及道路养护等至关重要。
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