elementary
/ˌelɪˈmentrɪ; ˌɛlə`mɛntərɪ/ adj
1 [attrib 作定语]
(a) of or in the beginning stages (of a course of study) （一门课程的）入门阶段的, 初级的
an elementary class 初级班.
(b) dealing with the simplest facts (of a subject); basic （一科目）基础的, 基本的
elementary mathematics 基础数学.
2 easy to solve or answer 容易解决的; 容易回答的
The questions were so elementary that he easily passed the test. 问题很好答, 他轻而易举就及格了.