We rented the car by the day.

我们按日租用汽车。

《牛津词典》

The workers are paid by the day.

工人们按日计酬。

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India's seven to eight million pullers usually pay one-third of their earnings to the owner of a rickshaw to use it by the day.

VOA: special.2009.05.11

Some people can fight the brain off in this case, and control their food intake, maintain a healthy diet, and maintain a normal weight, but the number of such people in the population is shrinking by the day.

有些人可以抵制大脑的控制,控制食物的摄入量,维持健康饮食 保持正常体重,而今,这类人的数量日益减少

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

That's--if this were a scientific study, I would be instructing you to do that so you wouldn't forget anything by the end of the day.

如果进行科学研究,我就会指导你们去做这个,最后你们就不会忘记任何东西

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

And he will lead a flock of 2.6m that gets less homogeneous by the day.

ECONOMIST: New York��s Catholics

We think Android is very, very fragmented and becoming more fragmented by the day.

FORBES: Steve Jobs' Own Words From His Last Earnings Call

Digital words seem cheap because they are, and they grow cheaper by the day.

WSJ: David Gelernter: The Pros and Cons of Cyber-English