来源：沪江听写酷 2011-03-10 17:46
lethargy n. 昏睡,瞌睡,无力气
The same lethargy,I am afraid,characterizes the use of all our faculties and senses. Only the deaf appreciate hearing,only the blind realize the manifold blessings that lie in sight. Particularly does this observation apply to those who have lost sight and hearing in adult life. But those who have never suffered impairment of sight or hearing seldom make the fullest use of these blessed faculties. Their eyes and ears take in all sights and sounds hazily,without concentration and with little appreciation. It is the same old story of not being grateful for what we have until we lose it,of not being conscious of health until we are ill. I have often thought it would be a blessing if each human being were stricken blind and deaf for a few days at some time during his early adult life. Darkness would make him more appreciative of sight;silence would teach him the joys of sound.