题目内容
prep. about sth.; involving sb./sth.
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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
n. the thickness of a solid, liquid or gas measured by its mass per unit of volume; the quality of being dense; the degree to which sth. is dense
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