题目内容
n. a person who is the official head of a country or region that is governed by another country
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adj. not good or not as good as sb/sth else;
n. the branch of mathematics involving points, lines, planes, and figures
adj. feeling ashamed because you have done sth that you know is wrong or have not done sth that you should have done
n. a drawing or picture in a book, magazine, etc. especially one that explains sth
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