在正常情况下，只有约百分之二十到百分之四十的维生素E被吸收。

Under normal conditions, only about 20 to 40 percent of vitamin E is absorbed.

《柯林斯英汉双解大词典》

百分之二十的同学一点也不锻炼。

Twenty percent of the students don't exercise at all.

youdao

百分之二十的人一周只锻炼一到三次。

Twenty percent of us exercise only one to three times a week.

youdao

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