可有一天，她许诺在我下一次生日的时候，她要让老天下雪。

But one day, she promised that she would make it snow on my next birthday.

youdao

设想你天天吃大米，可有一天，你去商店时发现其价格已超出了你的支付能力。

Suppose you eat rice every day, but one day you go to the store and discover that the price is higher than you can pay.

youdao

可有一天早上，一辆警车在十二点时停在布朗太太家门口，两位警官帮着布朗先生下了车。

But one morning a police car stopped outside Mrs. Brown's house at twelve o 'clock, and two policemen helped Mr. Brown to get out of the car.

youdao

Now the hope--the hope is that someday there will be biological measure of what people are eating.

现在的希望是,某一天会有一种生物学手段,可用于研究人们吃什么

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选