adj.未稀釋的；未攙假的；未沖淡的
Essential oils should never be used undiluted on the skin. 精油絕對(duì)不能未稀釋,就應(yīng)用到皮膚。
I looked back on that time with undiluted pleasure. 我在回顧那段時(shí)間時(shí)，興味仍不減當(dāng)年。
