His classmates were labouring with elementary algebra.他的同学们正在绞尽脑汁地演算初等代数题.He served as an elementary-school custodian for 20 years.他当小学管理员20年了。an elementary English course基础英语课程Using Greek sources, he compiled in Latin s...
A proton is an elementary particle of matter.质子是物质的基本粒子。an elementary English course基础英语课程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....
这款相机既坚固耐用,又有超凡的光学性能和快门速度。The camera combines rugged reliability with unequalled optical performance and speed.摄影师停止按动快门,匆匆绕过拐角。The photographer stopped clicking and hurried around the corner.对这类相机而言,快门的速度是固定的。With this t...