Guardon.瓜尔多guardv.看守；守卫；保卫；提防n.警戒；哨兵；防护装置；警卫；【体】后卫guard sensitivity安全灵敏度guarded coroutine[计] 保护协同程序guard of computer计算机保护guarding a target守卫一个目标guard a city gate把守城门guard ring method护环法guard against use防除利用guard timber bolt护木螺栓guardrail barrier公路护栏Guard's van valve