像人头税一样,递减税占穷人收入的比例更大。
7.permission n.允许, 许可, 准许,批准
例句:Did he give you permission to take that?
他允许你拿那个东西了吗?
I have obtained a written permission from the chairman.
我从主席那里获得了书面许可。
8.contamination n.污染;弄脏;毒害
例句:tests for pesticide contamination in food
对食物中农药污染的检验
There is already a high level of environmental contamination.
环境污染的程度已经很高。
9.assess vt.估价, 估计
评定, 核定
例句:We should equitably assess historical figures.
我们应该公正地评价历史人物。
10.marvelously adv.令人惊讶地;不可思议地;妙极地
例句:Their voices blend marvelously as they sing in chorus.
他们合唱时嗓音非常和谐。
11.painstakingly adv.刻苦地;煞费苦心地
例句:He’s always painstakingly at his books.
他总是在埋头苦读。
Every aspect of the original has been closely studied and painstakingly reconstructed.
原作的每一细节都经过了仔细研究,费尽苦心才得以重现。
12.immense adj.极大的, 巨大的
例句:They made an immense improvement in English.
在英语方面他们取得了巨大的进步。