identical
a. （to, with）相同的，相等的；同一的
Some twins are totally not identical in looks.
有些双胞胎的样子完全不同。
No two leaves are identical in the world.
世界上没有两片完全相同的叶子。
inferior
a. 劣等的，次的；下级的 n. 下级，下属
Inferior products in the market will hurt the consumers greatly.
市场上的劣质产品会对消费者造成极大的损害。
Even now, some people still believe that women are inferior to men.
即便是现在，还有人认为女人不如男人。
internal
a. 内的，内部的；国内的，内政的；内心的
Internal fights in the court is an important reason for a dynasty to die.
宫廷内部斗争是一个朝代灭亡的重要原因。
launch
n. 发射；（船）下水，（新产品）投产 vt. 发射；发起（运动），推出（产品）；（into, in）使开始从事；使（船）下水
The first artificial satellite was launched by the former Soviet Union, which shocked the United States.
前苏联发射了第一颗人造卫星，这让美国人大惊失色。
Students in our college launched a campaign of environmental protection.
我们学校的学生发起了一项环保活动。
mechanism
n. 机械装置；机制，机理；办法，途径
The internal mechanism of a piano is far more complicated than I can imagine.
钢琴内部的机械构造比我想象的复杂多了。
The product circulation should be decided by the market mechanism.
商品的流通应该由市场机制来决定。
negative
a. 否定的；消极的；负的，阴性的 n. （相片的）底片；负数
The most horrible thing for wooing somebody is a negative answer.
求爱最可怕的事情就是得到否定的答复。
Two negatives make a positive.
负负得正。
obligation
n. 义务，责任
Raising old parents is an obligation of every citizen.
赡养年迈的父母是每一位公民的义务。
panic
n. 恐慌，惊慌，慌乱 v. （使）恐慌，（使）惊慌失措
The global financial crisis caused panic selling of securities.
全球金融危机引起了债券抛售恐慌。
peer
n. 同龄人，同等地位的人；贵族 vi. 仔细看，费力地看
After the exercise, the teacher asked us to do peer critic.
做完练习后，老师让我们对彼此的表现做出评价。
Without glasses, I couldn't see a word in the newspaper, no matter how closer I peered at it.
不戴眼镜的话，我凑得再近也看不清报纸上的字。
rarely
ad. 不常，难得
Total solar eclipse is really rarely seen.
日全食真是难得一见。
Only rarely does my mom put on some makeup.
我妈妈极少化妆。
scandal
n. 丑事，丑闻；流言飞语；反感，愤慨
Four British Chancellors resigned in two days, because of reimbursement scandals.
两天之间英国四位大臣因报销丑闻辞职。
stock
家畜，牲畜 v. 储备 a. 常用的，常备的
After the economic recovery, many companies will sell stocks first.
经济复苏后，许多公司都要先处理存货。