题目内容
n. a person who is an expert in a particular area of work or study
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n. a type of solid, liquid or gas that has particular qualities
n. a piece of information, or a story, that people talk about, but that may not be true
n. the position, especially a high position, that sb. has in a particular organization, society, etc. ; v.to give sb. /sth. a particular position on a scale according to quality, importance, success, etc. ;to have a position of this kind
n. a fault in sb. 's character, a plan, a system, etc.
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