discount
n.折扣 vt.把…打折扣;不信，漠视，低估
at a discount Employees can buy books at a discount.员工购书可享受折扣。
discourage
vt.使泄气，使灰心;阻止，劝阻
attempts to discourage illegal immigration阻止非法移民的尝试
equality
n.相等，相同，平等
All people have the right to equality of opportunity.人人都有机会均等的权利。
equivalent
a.相等的，相当的 n.等价物，意义相同的词
I had no dollars, but offered him an equivalent amount of sterling.我没有美金，但给了他等值的英镑。
hoist
vt.(举，升，吊)起 n.起重器械;举起
The crew hurried to hoist the flag.船员们急忙升起了旗帜。
