1.able - v. having the power to do something
2. about - ad. almost (eg：about half); of or having a relation to (eg：We talk about the weather.)
3.above - ad. at a higher place
4.accept - v. to agree to receive
5.accident - n. something that happens by chance or mistake; an unplanned event
6.accuse - v. to say a person is responsible for an act or crime; to make a statement against someone
7.across - ad. from side to side; to the other side
8.act - v. to do something
9.activist（激进分子） - n. one who seeks change through action
10.actor - n. someone acting in a play or show
11.add - v. to put (something) with another to make it larger; to say more
12.administration - n. the executive part of a government, usually headed by a president or prime minister
13.admit - v. to accept (eg：admitted to the United Nations); to express one's guilt or responsibility (eg：He admitted that what he did was wrong.)
14.adult - n. a grown person
15.advise - v. to help with information, knowledge or ideas in making a decision
16.affect - v. to produce an effect on; to influence (eg：A lack of sleep affected the singer's performance.)
17.afraid - ad. feeling fear
18.after - ad. later; behind
19.again - ad. another time; as before
20.against - ad. opposed to; not agreeing with something
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