名词
中文翻译：关键时期
同义词：
['pertinent period', 'sensitive period']
例句：
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1.The researcher found that the critical period for learning a new language is between the ages of 6 and 12.
研究人员发现学习一门新语言的关键时期是6到12岁之间。
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2. During this critical period, the company decided to invest in new technology.
在这个关键时期，公司决定投资新技术。
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3. The scientist discovered a new chemical compound during his critical period of discovery.
科学家在他的关键发现期发现了一种新的化合物。