| 单词 | sideline | 
| 释义 | Word Frequency sideline(ˈsaɪdˌlaɪn) noun 1.  sport a line that marks the side boundary of a playing area 2.  a subsidiary interest or source of income  3.  an auxiliary business activity or line of merchandise  verb (transitive) 4.  to prevent (a player) from taking part in a game  5.  to prevent (a person) from pursuing a particular activity, operation, career, etc  | 
	
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