as every schoolboy/schoolchild knows idiom
小学生的常识
used before you mention a fact that is familiar to everyone, including children
As every schoolboy knows, the earth revolves around the sun. 地球绕着太阳转，这是小学生的常识。
江苏热线英汉汉英双解词典包含207361条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。