参与者焦点很重要，你可以指定系统为参与者做什么，而不必担心用例按序排列的问题。
The actor focus is important; you can specify what the system does for the actor without worrying about ordering the use cases sequentially.
国父乔治·华盛顿在排名中名列第二，紧接着按序排列的是富兰克林d。罗斯福，西奥多·罗斯福，杜鲁门，他们分别名列第三、四和五名。
Founding father George Washington finished second in the new survey, followed by Franklin D. Roosevelt, Theodore Roosevelt, and Harry Truman, in that order.
“综合点阵靶板”采用灰色圆点黑色间带图案，方便了点按序标记排列，从而确定畸变点与理想点的一一对应。
The integrated spot array target board consists of gray spots and black interval belts, and makes it convenient to mark the spots in sequence and correspond the distorted points to the ideal points.
“综合点阵靶板”采用灰色圆点黑色间带图案，方便了点按序标记排列，从而确定畸变点与理想点的一一对应。
The integrated spot array target board consists of gray spots and black interval belts, and makes it convenient to mark the spots in sequence and correspond the distorted points to the ideal points.
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