to begin by doing something, or to make something begin by doing something

She started off the meeting with the monthly sales report. 她在会议开始时首先做了月度销售报告。

I'd like to start off by thanking you all for coming today. 首先，我想感谢大家今天的光临。

to help someone to start an activity, especially a piece of work

I'll start her off on some fairly basic stuff and see how she gets on. 我会先让她做些相当基础的事情，看看她做得如何。

to make someone start to laugh, cry, or talk about something that they talk about often

I could see Emma trying not to laugh and of course that started me off. 我注意到埃玛想忍住不笑，当然，那却惹得我笑了出来。