There is no I/O manager in Linux: all I/O requests go to the file system at the beginning (see Figure 2).

Linux 没有 I/O 管理器。 所有 I/O 请求从开始就进入文件系统（参见图 2）。

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This lidar system allows three-dimensional measurements by using a steering unit, and can measure four kinds of pollutants in atmosphereaerosol, SO 2, NO 2, and O 3.

该雷达系统能监测四种大气污染物，即大气气溶胶、二氧化硫、二氧化氮和臭氧。

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