名词短语
中文翻译：线段时期
同义词：
['period of line', 'lineage period', 'lineage period', 'lineage period']
例句：
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1. Theline period is crucial for understanding the development of a species.
线段时期对于理解物种的发展至关重要。
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2. During the line period, the population growth rate was relatively stable.
在这一时期，人口增长率相对稳定。
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3. The line period is often used to describe the time between two significant events in history.
线段时期通常用来描述历史上两个重要事件之间的时间。