A blade guard is fitted to protect the operator.为保证操作人员的人身安全安装了桨叶保护罩。A sharp blade is likely to nick the skin and draw blood.锋利的刀刃可能会划伤皮肤，导致出血。The soil sticks to the blade and blocks the plough.土粘在犁铧上，卡住了犁。...
每晚你都会听见炼钢厂的下班哨声。Every night you could hear the whistles of the steel mill.裁判最后吹响了终场的哨声。The referee finally blew the whistle to stop the game.乘务员哨声一响,司机开动机车.At the conductor's whistle the engine - driver starts his l...