名词
中文翻译：Unknown
同义词：
['cluster roll', 'clustering roll', 'rolling cluster']
例句：
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1. The team performed a cluster roll to gain momentum before the game.
团队在比赛前进行了一次群集滚动以获得动力。
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2. The researchers discovered that clusters of bacteria could be used as a natural antimicrobial agent.
研究人员发现细菌群落可以作为天然的抗菌剂。
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3. During the assembly, the engineers rolled a cluster of parts together to form a larger structure.
组装期间，工程师们将一组零件滚动在一起形成更大的结构。