There is a precedence relationship between tasks. Each task has its own normal working time and crashed working time. Each task has its own cost per day of working faster.
工序与工序之间存在着一定的前后关系，每个工序有着自己的正常加工时间和通过赶工所能达到的最短加工时间以及每赶工一天的赶工费用。
The taxi ride cost 23 quai – and gave me a comfortable and interesting start of my working day!
坐的士花了23块 – 让我享受了一个轻松愉快的早晨！
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