His classmates were labouring with elementary algebra.

他的同学们正在绞尽脑汁地演代数题。

Most children go to public elementary and secondary schools.

大多数孩子上的是公立小学和公立中学。

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。

I always use my clients' products. This is not toadyism but elementary good manners.

我总是用客户的品。这并不是谄媚奉承，而是良好的基本态度。

Let G be an infinite group. If G has a normal elementary abelian subgroup, then G is irrecognizable.

设G是无限群,若G存在正规交换子群,则G是不可分辨的.

Nonnatural amino acid 3-(4-thiazolyl)-D,L-alanine hydrochloride and its four intermediates were synthesized, their structures were detenmined by IR,NMR,elementary analysis and melting point.

合成了氨基酸3-(4-噻唑基)-D，L-丙氨酸盐酸盐以及三个中间体，其结构分别通过红外光谱、核磁共振、元素分析、熔点测试手段得到确证。