know ... like the palm of one's own hand;as plain as pointing to one's hand;be thoroughly familiar with ...;clear like pointing at a palm;know sth. like the palm of one's hand ;

I asked about one or two things that interest me and she really did know it all backwards.
我问了一两样我感兴趣的东西,她的确都了如指掌。
来源:《柯林斯高阶英汉双解学习词典》They know the sport inside out, and we treat them with the respect they deserve.
他们对这项体育运动了如指掌,我们也给予了他们应有的尊重。
来源:《柯林斯高阶英汉双解学习词典》He was well acquainted with the literature of France, Germany and Holland.
他对于法国、德国和荷兰的文学了如指掌。
来源:《柯林斯高阶英汉双解学习词典》You've made that same trip so many times before that you're on automatic pilot.
这一行程你以前已经走过多次了,早就了如指掌了。
来源:《柯林斯高阶英汉双解学习词典》People assume they know me through and through the moment we meet.
人们一见到我,就自以为对我了如指掌了。
来源:《柯林斯高阶英汉双解学习词典》I've always found him clued-up on whatever he was talking about.
我一直都觉得他对自己谈论的任何事情都了如指掌。
来源:《柯林斯高阶英汉双解学习词典》
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