up your street了如指掌

【使用地区】：英国

【释义】：

Said of something someone is very familiar with or knowledgeable about．“A book on skydiving—that’s right up your street．”Americans would say right up your alley．

意为“对……非常熟悉，了如指掌”。如：“一本关于跳伞的书，你再熟悉不过了。”美国人的说法是right up your alley。