1. The disease develops gradually and imperceptibly. 该疾病难以察觉地逐渐发展着。
2. Slowly and almost imperceptibly the road started to climb upwards, looping its way in languid curves around the forested hills. 道路缓慢而几乎不可察觉地开始向上攀升,在林木环绕的山丘上曲折地蜿蜒前进。
3. Seemed oneself to imperceptibly drop into a scheme inside. 似乎自己不知不觉掉进了一个阴谋里。
4. Imperceptibly you let my heart, after you let me heartache. 不知不觉你让我心动,后知后觉你让我心痛。
5. Which from the time of my life occurred imperceptibly change it. 哪时起,我的生活在潜移默化地发生着改变呢。