1. El Salvador produces 100,000 tons of refined copper annually. 萨尔瓦多一年生产10万吨精炼铜。
2. 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。
3. Her diet consisted of natural food, uncontaminated by pesticides, salt or refined sugar. 她的膳食是由未受农药、盐或精制糖污染过的天然食品构成的。
4. The sugared vinegar is refined from the sugarcane and pine. 加糖的醋是从甘蔗和松木中精炼出来的.
5. Tears can be obtained painlessly without invading the body and only tiny amounts are needed to perform highly refined analyses. 人们可以轻松地获取眼泪，不会对身体造成伤害，而且只需要微量的眼泪就可以进行高度精细的分析。
