Some students failed to grasp even the simplest mathematical concepts.
It’s important that children learn to understand the concept of sharing.
The first year introduces the basic concepts of management.
The company launched its discount airline concept in 1989.
a new concept in fast food
英语词典包含67175条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。