She saved him from drowning, but only at the cost of her own life.
他遇溺时她把他救了，但却牺牲了自己的生命。
He dived from the bridge to rescue the drowning child.
他从桥上跳入水中去抢救那溺水儿童。
He ran the risk of losing his own life in saving the boy from drowning.
他冒着生命危险把孩子从水里救了出来。
