She soon learned that 7-year-old Hima sold the rocks to support her family.

她很快了解到7岁的希马是靠卖石头来养家的。

youdao

I saw an old lady get on the subway with a 7-year-old child who seemed to be her grandson.

我看见一个老太太带着一个七岁的孩子上地铁，那孩子好像是她的孙子。

youdao

One day, when he went to get his 7-year-old son from soccer practice, his kid greeted him with a downcast face and a sad voice.

有一天，当他去接他7岁的儿子放学回家时，他的儿子一脸沮丧，用悲伤的声音跟他打招呼。

youdao

The number was 7% higher than the year before.

VOA: special.2009.01.08

Like how can you possibly figure that out with actually compelling a machine to do it for you and sure enough we chatted for a few moments, I kind of gently pointed out well it's kind of like problem 7 last year.

就好像去逼计算机为你做这件事,就能解决问题一样,我们确实谈过这个问题，我委婉地告诉他,这种情况与我们去年讲过问题7类似。

哈佛公开课 - 计算机科学课程节选

Looking at this particular group, he estimated survivorship bias to be 4.4% per year and backfill bias to be 7.3% per year.

分析这个特定的样本,他估算其生存偏差每年达到4.4%,回填偏差每年达到7.3%

耶鲁公开课 - 金融市场课程节选