Adolescent suicide is rarely an impulsive reaction to immediate distress.青少年自杀很少是由于突然发生不幸而作出的冲动反应。He spent his adolescent years playing guitar in the church band.他在教堂的乐队里弹吉他，度过了他的青少年时期。A little adolescent rebellion is co...
Human perception is highly imperfect and by definition subjective.人的感知具有高度缺陷，而且天性主观。an imperfect understanding of English对英语的不透彻理解Soot is the product of the imperfect combustion of fuel.煤烟是燃料不完全燃烧的产物....