operation mileage rate 行程利用率
The extra tire life extends the tire mileage and decreases the operation cost for the end-users.
额外的轮胎寿命延长了轮胎使用里程，为终端用户降低了操作成本。
Wuhan-Guangzhou high-speed railway, which has the world's longest mileage of one-time construction and the highest speed of railway operation, has officially opened.
世界上一次性建设里程最长、运营速度最快的铁路——武广高铁客运新干线正式开通运营。
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