She fell off a horse and suffered a con-cussion.她从马上摔下来，造成了脑震荡。His exhaust fell off six laps from the finish.离终点还有6圈时，他的排气管掉了下来。Suddenly the horse lurched to one side and the child fell off.马突然歪向一边，小孩就摔了下来。...
Did equilibration take place before or after setting of chromite and silicates?究竟平衡作用发生在铬铁矿和硅酸盐下沉之前,还是在其后?The chromite deposits in the Muskox Complex occur only in feldspathic peridotite.在穆斯科克斯杂岩体中,铬铁矿矿层仅产于长石质橄榄岩中.Knowle...