know something inside out idiom informal
C1 对…了如指掌
to know everything about a subject
He knows the system inside out. 他对该体系了如指掌。
单词 | know something inside out |
释义 | know something inside out idiom informal C1 对…了如指掌 to know everything about a subject He knows the system inside out. 他对该体系了如指掌。 |
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