例如，我姐姐的生日是12月9日，她最好的生日是她满9岁的那一年。

So, for example, my sister's birthday is December 9th and her golden birthday would have been the year she turned nine years old.

youdao

例如，我姐姐的生日是12月9日，她的黄金生日本应是她满9岁的那一年的生日。

For example, my sister's birthday is December 9th and her golden birthday would have been the year she turned nine years old.

youdao

这件事发生在他4岁的那一年。

It happened when he was 4 years of age.

youdao

The expected life spans increased dramatically in the last couple of hundred years until now, for people that were born when you were born you can expect to live to be 80 years old, a doubling in life span, fairly dramatic.

从几百年前到现在,预期寿命显著增长了,你们同期出生的那批人,能够活到八十岁,预期寿命增长了一倍,令人印象深刻

耶鲁公开课 - 生物医学工程探索课程节选