词语: 了如指掌
拼音: liǎo rú zhǐ zhǎng
解释: 词语解释了如指掌liǎo rú zhǐ zhǎng◎形容对情况极为清楚。例如对他们的活动,他完全了如指掌。英文have sth.at one’s fingertips; know as one know his ten finge; know like a book; know as well as a beggar...
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