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on top of/了若指掌

http://www.sina.com.cn 2002/09/17 10:04 空中美语

　　俚语：on top of/了若指掌

　　定义：remain very informed about a rapidly changing situation.对变化迅速的局势仍很清楚

　　例句：She's so busy herself but she's always on top of what all her friends and relatives are doing.她非常地忙碌，但对于她的朋友和亲戚在做什么都知道很清楚

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