一般而言，我们为不同任务提供了一个大致正确的评估，然后根据将每个任务所指定的人员的技能和经验增加或减少一定的百分比。
Traditionally, we have provided a single ballpark estimate for different tasks, and then added or removed some percentage depending upon the skill and experience of the person assigned to each task.
指定一个适用于所有系统的用户名结构并且提供一定的灵活性，这可能是一项棘手的任务。
Specifying a user name structure that works on all systems and provides enough variability can be a daunting task.
一个自由职业新人和有一定经验的自由职业者的区别在于是否能顺利完成商业任务。
The difference between a new freelancer and one who’s been at the game for a little while is whether the business runs smoothly.
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