early on 在这里是 “在早期”的意思,是一个固定搭配的短语
Many European schools introduce the concept of professional training early on in order to make sure children are properly equipped for the professions they want to join.
欧洲的许多学校早期引入职业培训概念,目的是确保孩子们具备欲从事的职业所需的技能.
句子中的on是怎么来的,和哪个单词搭配么,在句子中做什么