今日長難句However, it has been found that even people insensitive to a certain smell at first can suddenly become sensitive to it when exposed to it often enough.（完形，2005）
insensitive / in?sens?tiv / adj.無感覺，無反應，未意識到的
certain / ?s?:tn / adj.確定；確信；某種
sensitive / ?sens?tiv / adj.感覺敏銳的
expose / ik?sp?uz / adj.暴露；顯露
結構分析（圖片點擊可放大）
翻譯
然而，研究發現，即使是開始對某種特定氣味不敏感的人，如果經常接觸這種氣味，也會突然變得對它敏感起來。
預告明日長難句
The explanation for insensitivity to smell seems to be that the brain finds it inefficient to keep all smell receptors working all the time but can create new receptors if necessary.（完形，2005）
