高中英语set out和start off意思一样吗

用法不一样
set out
1.To begin an earnest attempt; undertake:He set out to understand why the plan had failed.
2.To lay out systematically or graphically:set out a terrace.
3.To display for exhibition or sale.
4.To plant:set out seedlings.
5.To start a journey:She set out at dawn for town.
start off
vb(adverb)
1.(intr) to set out on a journey
2.to be or make the first step in an activity; initiate he started the show off with a lively song
3.(tr) to cause (a person) to act or do something,such as to laugh,to tell stories,etc.