He set off for work an hour ago. Hasn't he arrived?
他一小时前就去上班了，难道还没有到吗？
If it will take more than half an hour or so, considering using the Pomodoro technique: set a timer for 25 minutes and work steadily until the timer goes off.
如果这需要花费超过一个半小时，考虑使用番茄工作法，每次设置25分钟，开始去做，直到时间到了。
The method of off-set compensation for tool path is thought important due to its high work efficiency and low cost.
刀位补偿加工方式因其加工效率高、成本低而受到研究者的重视。
The method of off-set compensation for tool path is thought important due to its high work efficiency and low cost.
刀位补偿加工方式因其加工效率高、成本低而受到研究者的重视。
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