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1.refined adj. [油气][化工][冶] 精炼的；精确的；微妙的；有教养的
This technique is becoming more refined and more acceptable all the time.
这项技术变得越来越精密和受人欢迎。
2.mortality n. 死亡数，死亡率；必死性，必死的命运
The nation's infant mortality rate has reached a record low.
该国的婴儿死亡率已达历史最低。
3.grazing n. 放牧；牧草 v. 擦过；抓伤（graze的现在分词）
He had nearly a thousand acres of grazing and arable land.
他拥有近千亩的牧场和可耕地。
