B: I guess you didn't know that he had an operation on his knee.
你大概不知道吧，他膝盖做手术了。
Group B: Routine operation in 48 cases as control.
组48例采用常规手术方式作对照。
Nangang B. F operation management system has been put into application, and goes on well.
南钢高炉操作管理系统已经在南钢投入应用，目前使用状态良好。
B: I think I am skilled in computer operation and maintenance.
B：我非常精通电脑操作和维修。
B: I think I am skilled in computer operation and maintenance.
B：我非常精通电脑操作和维修。
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