名词
中文翻译：周期
同义词：
['period', 'cycle', 'interval', 'span', 'phase', 'period of time例句：1. The researcher found that the growth rate of the plant was affected by the period of its life cycle.（研究者发现植物的生长速率受其生命周期的时期影响。）2. During the 20th century', "the industrial revolution marked a significant period in human history.（在20世纪，工业革命标志着人类历史上的一个重大时期。）3. The company's performance has been in a downturn for several years", 'showing a significant period of decline.（该公司的业绩已经连续几年下滑，显示出一个显著的下降期。）']
例句：
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1. The researcher found that the growth rate of the plant was affected by the period of its life cycle.
研究者发现植物的生长速率受其生命周期的时期影响。
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2. During the 20th century, the industrial revolution marked a significant period in human history.
在20世纪，工业革命标志着人类历史上的一个重大时期。
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3. The company's performance has been in a downturn for several years, showing a significant period of decline.
该公司的业绩已经连续几年下滑，显示出一个显著的下降期。