题目内容
n. advice, criticism or information about how good or useful sth. or sb.'s work is
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n. an infectious disease like a very bad cold, that causes fever, pains and weakness
n. a statement showing that two amounts or values are equal; the act of making sth. equal or considering sth. as equal
v. to come out of a dark, confined or hidden place
adj. serious and very important; affecting the most central and important parts of sth.; forming the necessary basis of sth.
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