elementary
adj.基本的;初级的;[化]元素的;初等
1.He expressed the hope that on Monday elementary schools would be reopened.
他表示希望各小学星期一能复课。
2.A proton is an elementary particle of matter.
质子是物质的基本粒子。
3.an elementary English course
基础英语课程
4.a predominance of female teachers in elementary schools
小学里女教师居多的现象
5.Their course of study includes elementary hygiene and medical theory.
他们的课程包括基础卫生学和医疗知识。