touch-off放火火灾
touch h off触发
Touch Switch off参考频率下
touch-off f放火火灾
number touch off数字触发
Palace touch off device断器摸宫
touch off a debate引起争论
sound intensity touch off声强触发
positive valtage touch off正电压触发
PHRASAL VERB（动词词组） If something touches off a situation or series of events, it causes it to start happening. 引发
The lightning could touch off wildfires in Eastern Washington.
闪电可能引发华盛顿东部的野火。