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...
雇主以种族或国籍为由歧视员工是非法的。Discrimination by employers on the grounds of race and nationality was illegal.无标志的预约型出租车沿街拉客是非法的。Minicabs are prohibited by law from touting passers-by for business.国会决议认为他的免职是非法的。Parliament had decid...