輸入需要查詢的詞語：
詞條：瞭如指掌
liǎoruzhǐzhǎng
[have sth.at one's fingertips; know as one know his ten fingers; know like a book; know as well as a beggar knows his bag] 形容對情況極為清楚
對他們的活動,他完全瞭如指掌
相關：瞭如指掌 反義詞、 瞭如指掌 近義詞