名词
中文翻译：初级收缩
同义词：
['primary constraint', 'primary limitation例句：1. The growth of the plant is limited by its primary constriction.（植物的生长受到其初级限制的制约。）']
例句：
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1. The growth of the plant is limited by its primary constriction.
植物的生长受到其初级限制的制约。
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2.The primary constriction in the blood vessel restricts blood flow.
血管中的初级限制阻碍了血流。
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3. The primary constriction in the lungs restricts airflow.
肺部的初级限制阻碍了空气流动。