?对某事认识很透彻
... Was my face red! 我真是非常不好意思 know something inside out 对某事认识很透彻 sleep on it 花个一二天考虑一件事后再作决定 ...
?了解彻底
know something inside out 了解彻底 4. know next to nothing 差不多不了解;差不多一无所知 .
?知根知底
... In the know 知情的,消息灵通的 Person in the know 知情人 Know something inside out 知根知底,了如指掌 ...
英汉双解词典包含3185865条英汉词条,基本涵盖了全部常用单词的翻译及用法,是英语学习的有利工具。