【巨匠美語】學美語教學吉將瘋片語 -have.... at one's fingertips

have.... at one's fingertips，把.....放在指尖，隨手可得，意指(精通某事所以資料)隨手拈來。

ex：He has the whole body of laws at his fingertips. Go and pick his brains.

Gjun~就愛嗑英文吐司

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