天骄建材
引出的英文是extraction。
英：[ɪkˈstrækʃn]；美：[ɪkˈstrækʃn]
n.提取；提炼；拔出；开采；有......血统；族裔；拔牙
复数：extractions
extraction yield 提取率
data extraction 数据析取
dust extraction 除尘
1.His real father was of Norwegian extraction
他的亲生父亲是挪威裔。
2.The local economy is overwhelmingly dependent on oil and gas extraction
当地经济过于依赖石油和天然气的开采。
若伦丫头
A guiding principle of teaching in which teachers, in the teaching process based upon the objective laws of the teaching tasks and learning, take the actual level of the students as the starting point by using a variety of ways to focus on the inspiration of the students' thinking while mobilizing them with initiative and enthusiasm, prompting them to learn lively.
