① 查明;确定;弄清(经查证而确知) 本义 动词 认知域 理据— 例句The police are trying to ascertain the cause of the accident.警方正努力查明事故的原因。We need to ascertain the facts before making a decision.作决定前,我们必须把事实弄清楚。 溯源路径本义