名词
中文翻译：紧密集合
同义词：
['close formation', 'close packing', 'close arrangement']
例句：
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1. Theteam worked closely to achieve the goal.
团队密切合作以实现目标。
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2. The tight schedule made it difficult for everyone to stay on top of everything.
紧张的时间表使每个人都难以跟上所有事情。
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3. The researchers conducted a close examination of the data to ensure accuracy.
研究人员对数据进行了仔细检查，以确保准确性。