与单独飞行的鸟类相比，以V形飞行的加拿大鹅在没有休息的情况下可以多飞行百分之七十的距离。

Canada geese flying in a V shape can fly seventy percent farther without having a rest than the birds flying alone.

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研究发现，有百分之七十的情况符合精神障碍的诊断指标。

Seventy percent of subjects met diagnostic criteria for a current mental disorder, the researchers found.

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随着时间的推移，更有百分之七十的鸟类物种从小的森林碎片上销声匿迹。

Over time, as much as 70 percent of bird species disappeared from the smallest fragments.

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Well, the vaccine turned out to be about 70% effective.

疫苗的有效率为百分之七十左右

耶鲁公开课 - 生物医学工程探索课程节选

If smallpox occurred in your community, about 30 percent of the people that acquire the disease would die from it; the other 70 percent could be disabled or permanently disfigured as a result of the disease.

如果你周围有人得了天花的话,那么百分之三十的天花病人,会因此死亡,剩下的百分之七十会成为残疾或永久毁容,这都是天花造成的

耶鲁公开课 - 生物医学工程探索课程节选