今天我们要学的词是 investigator, investigator is spelled i-n-v-e-s-t-i-g-a-t-o-r, investigator. Investigator 调查人员。Egypt said that investigators found no "illegal or terrorist act" in the October crash of a Russian passenger plane.埃及政府表示，调查人员没有发现十月份俄罗斯客机的坠毁是“非法或恐怖行动”造成的。