With typical use, about 27 percent of women who use the withdrawal method experience an unintended pregnancy within the first year of use (4 percent with perfect use).
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With typical use, about 27 percent of women who use the withdrawal method experience an unintended pregnancy within the first year of use (4 percent with perfect use).
用典型使用的方法，大约有27%的有过撤回方法经历的女性在第一年的使用中意外怀孕(而完美使用的这一比例为4%)。
One 2013 study of college students found that 80% of students use their phones or laptops during class, with the average student checking their digital device 11 times in a typical class.
2013年的一项关于大学生的研究发现，有80%的学生在课上使用手机或笔记本电脑，在一堂平常的课上，平均每个学生查看数码设备的次数高达11次。
Since we cannot run the use cases with all possible input values, we must restrict ourselves to the typical values as advised by the users of the system.
由于我们不能用所有可能的输入值运行用例，所以我们必须只局限于系统用户所建议的典型值。
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