Ejector seat levers can only be used once, and their consequences are significant and irreversible.弹射座椅操纵杆只能用一次, 它的使用将引起重要的变化,而且这个过程是不可逆的.The workers can manipulate the gears and levers of a machine skillfully.工人们能熟练地操纵机...
I was confronted with an array of knobs, levers, and switches.我面对的是一大堆旋钮、控制杆和开关。Levers and pulleys are simple machines.杠杆和滑轮是简单机械.The workers can manipulate the gears and levers of a machine skillfully.工人们能熟练地操纵机件....