It's the one where you have to get three shots over a period of six months, and so you have to remember to go back, you get a first ba--you get a first shot, you have to remember to go back after a month and get a second shot, you have to go back after six months and get a third shot.

这种疫苗需要在六个月里注射三次,所以你要记得再去,你第一次,你第一次注射后,你要记得一个月后再去注射第二次,六个月后,你还得再去注射第三次

耶鲁公开课 - 生物医学工程探索课程节选

You know, I came over on a holiday, the first time. I came on a six-month visa holiday.

那时我是来度假的，第一次来。凭六个月假期签证过来的。

想当军人的理由 - SpeakingMax英语口语达人

and to whoever wants to come by and see the farm stand we have set up on the first Friday of every month.

以及那些过来参观我们农场的人，在每个月的第一个周五。

有机农庭院 - SpeakingMax英语口语达人