名词
中文翻译：中生代种子
同义词：
['middle-aged seed', 'middle-aged plant', 'medium-aged seed']
例句：
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1. The ancient tree is a rare survivor of the middle-aged period.
这棵古老的树是中生代时期的稀有幸存者。
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2. The seeds of this plant are medium-aged and have a unique flavor.
这种植物的种子是中生的，味道独特。
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3. In the middle ages, people often used these seeds to make medicines.
在中世纪，人们常用这些种子制作药物。