名词
中文翻译：封闭的群体
同义词：
['closed community', 'closed pack', 'enclosed herd例句：1. The researchers found that the closed herd had a higher survival rate than the open one.（研究人员发现，封闭的群体比开放的群体有更高的生存率。）2. The herd of deer was so large that it could not be contained in a small pen.（鹿群如此之大，以至于无法被关在一个小围栏里。）3. The farmers decided to close the herd and sell the livestock at auction.（农民决定关闭牲畜群并拍卖这些家畜。）']
例句：
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1. The researchers found that the closed herd had a higher survival rate than the open one.
研究人员发现，封闭的群体比开放的群体有更高的生存率。
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2. The herd of deer was so large that it could not be contained in a small pen.
鹿群如此之大，以至于无法被关在一个小围栏里。
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3. The farmers decided to close the herd and sell the livestock at auction.
农民决定关闭牲畜群并拍卖这些家畜。