相关单词近义词 severe 严厉的, dangerous 危险的, serious 严肃的, grave 坟墓, lethal 致命的, incurable 不能医治的, deadly 致命的, critical 批评的, fatal 致命的, acute 严重的, mortal 致命的, grievous 痛苦的临近词life, Lifeampil相似词life-saver, life-saving, life-size, life-support system, lifebelt, lifeblood, lifeboat, lifeguard, 返回 life-threatening