一卵性双生児

「トムとジョンって一卵性双生児（いちらんせいそうせいじ）とは聞（き）いてたけど、本当（ほんとう）によく似（に）てるよね？」「似（に）てる似（に）てる。親（おや）にも時々（ときどき）間違（まちが）えられるって言（い）ってたよ。あの二人（ふたり）はほんと、已己巳己（いこみき）だよ」

"I heard that Tom and John are identical twins. They really do look alike, don't they?" "Yes, they really do look very similar. Even their parents say they get confused sometimes. Those two really are very similar, aren't they?"