了如指掌

Tony is very hot on local history.

托尼对当地历史了。

She knows the layout of the back streets like the back of her hand.

对那些偏僻的街道了。

She knows physiology from beginning to end.

对生理科了。

She knows every nook and cranny of the city, so she’s the perfect guide.

对个城市了，让做向道是再好不过了。