Returnable time not less than 70% operating time.

可返回时间不小于动作时间的70%。

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Creating a new time zone that is not already defined by the operating system.

建立作业系统尚未定义的新时区。

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Creating a new time zone that is not already defined by the operating system.

建立作业系统尚未定义的新时区。

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