However, if there are repeated, unexcused absences, there will be an adjustment in the grade calculation, and it will be worth twenty to twenty-five percent of your grade, and it will be a negative grade also.

然而，如果有反复的没有理由的缺勤，就会对这个百分比做些调整，出勤率就会占到你分数的百分之二十到二十五，当然也会是负面的评分。

耶鲁公开课 - 旧约导论课程节选

Eighty percent of atoms that are set up like that break down in the next 24 hours; 20 percent of them don't.

我们设定未来二十四小时中,有百分之八十的原子会分裂,另外百分之二十的原子不会

耶鲁公开课 - 死亡课程节选

And as I mentioned before, death would occur in 20-30 percent of the cases that got the most severe form of smallpox.

就像我刚说的,百分之二十到三十的,天花重症病人会死亡

耶鲁公开课 - 生物医学工程探索课程节选

No. All we can say is, there was an 80 percent chance it would, 20 percent chance it wouldn't, so most of them do, some of them don't.

不能,我们只能说,这个原子分裂的概率是百分之八十,不分裂的概率是百分之二十,它们当中的大部分会分裂,而一部分不会

耶鲁公开课 - 死亡课程节选

Sure. There was a 20 percent chance that it wouldn't.

当然,它不分裂的概率是百分之二十

耶鲁公开课 - 死亡课程节选