名词
中文翻译：边线
同义词：
['auxiliary', 'minor', 'secondary']
例句：
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1.The sideline player is often overlooked in the game.
在比赛中，这位替补球员常常被忽视。
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2. The team decided to bring in a new player as a sideline option.
球队决定引进一名新球员作为替补选项。
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3. The coach made a quick decision to switch to a different sideline player.
教练迅速决定换到另一位替补球员。