set off是什么意思啊?

set off是什么意思啊? set off 是什么意思啊? set out set away set aside set off 请问 都是什么意思? set off fireworks和let off fireworks是什么意思? set out,set up,set off,set In many places people like to set off firecrackers .是什么意思 set out与set off set aside set down set off set talk off set off啥意思? set off [light] fireworks set off什么意思?