如果火山灰进入飞机引擎，会导致引擎熄火。
If this ash gets into a jet 's engine , it can cause the engine to fail .
在上月火山喷发的高峰期，航空公司因担心火山灰进入飞机引擎导致飞行危险而停开航班。
the volcanic eruptions last month , airlines grounded their planes for fear the ash could jet engines and make flying unsafe .
火山引擎