如果您在刚开始时就知道系统需要做什么以及它需要如何做，您就可以预先进行大部分(如果不是全部)的设计工作。
If you know at the beginning what the system needs to do and how it needs to do it, you can do most (if not all) your design up front.
当别人给我们做某件事的观点时，我们要仔细考虑它，理论上如果应用，它是否会为我们工作。
When people offer us their opinion take it, think about it, theoretically apply it and see if it will work for you.
到期日：当工作被指定为到期时，如果操作者没有设置该数据区域的值，那么我们相信它的值就是迭代的截止日期。
Due date: When the work is specified as being due, if the contributor doesn't set value to this data field, we believe its value equal to the iteration's end date.
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