题目内容
n. a state of not being certain about what is happening, what you should do, what sth. means, etc.
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prep. about sth.; involving sb./sth.
v.to change food after it has been eaten into simpler forms that the body can use; to think about sth. so that you fully understand it
n.an accident in which two vehicles or people crash into each other; a strong disagreement between two people or between opposing ideas, opinions, etc; the meeting of two things that are very different
n. the act of taking control of a country, city,etc. by force
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