For greater benefit, the railway freight requires operation of double-decked container trains, making the clearance under the railway overpass insufficient.
为了提升效益，铁路货运需要开行双层集装箱列车，而上跨铁路立交桥桥下净空不足。
It also enhanced the K value for clearance of carbon particles in mice with insufficient immunity.
亦能提高免疫低下小鼠碳末廓清指数K值。
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