discard
vt.丢弃，抛弃
Discard any old cleaning materials.把所有用旧的清洁材料都扔掉。
discern
vt.看出，察觉出;识别，认出
Officials were keen to discern how much public support there was.官员们很想弄清楚公众的支持有多强烈。
discharge
vt.释放;排出 vi.排出，放电 n.释放;排出
Hospitals now tend to discharge patients earlier than in the past.比起以前，现在的医院总是让病人早些出院。
discipline
n.纪律;训练;惩罚;学科 vt.训练;惩罚
The book gives parents advice on discipline.这本书向父母提供了管教方面的建议。
disclose
vt.揭露，泄露，透露
Some companies have already voluntarily disclosed similar information .一些公司已经自愿透露了相似的信息。
