〔R136〕 Why did they say Paul had committed a terribly blind blunder after he was given a plug?

〔譯註〕 為什麼他們說保羅犯了一個恐怖的瞎了眼的大錯，在他被給一個插頭之後？

〔提問〕 If the reason was that they found Paul had put the plug into a hollow ( 低凹的 ) part of the face, what is the hollow part called?

 〔謎底〕  the s_____ of the eye