请输入您要查询的英文单词：
单词
know sth inside out
释义
know
sth
inside out
informal
C1
toknoweverything about asubject
对…了如指掌
Heknowsthesysteminside out.
他对该体系了如指掌。
#https://dictionary.cambridge.org//dictionary/english-chinese-simplified/know-sth-inside-out##