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1·Press Control-Z to suspend a running job; type bg and fg to run a job in the background and foreground, respectively; and type jobs to manage the list of jobs.

按Control - Z可以暂停正在运行的作业；输入bg和fg分别在后台和前台运行作业；输入jobs管理作业列表。

2·The magnetic bearing is a novel type, high performance bearing, which suspend the rotor by magnetic force without any mechanical contact between rotor and stator.

磁悬浮轴承是一种利用磁场力将转子悬浮于空中，使转子与定子之间实现无机械接触的一种新型高性能轴承。