名词短语
中文翻译：中性系列
同义词：
['neutral group', 'neutral spectrum', 'neutral line例句：1. The researchers are working on a neutral series of experiments to test the hypothesis.（研究人员正在开展一系列实验来测试这一假设。）']
例句：
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1. The researchers are working on a neutral series of experiments to test the hypothesis.
研究人员正在开展一系列实验来测试这一假设。
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2. The neutral series of books is well-regarded for its historical accuracy.
这套历史书籍因其准确性而备受推崇。
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3. In the neutral series of events, the first step was to secure funding.
在一系列事件中，第一步是确保获得资金。