If the engine backfires , the sudden pressure in the intake manifold forces the valve back.如果发动机回火, 进气歧管骤增的压力就迫使阀门向后移动.Also , this is why changing menus dynamically sometimes backfires.这就是为什么动态地改变菜单有时候事与愿违.My old car bac...
It can be concluded that irradiated sterile insect technique is feasible for integrated controlling cotton bollworm.辐射不育技术作为棉铃虫综合防治的措施是可行的.In china, it is advanced on transgenic bollworm resistant cotton in the world.我国棉...