单词：endothelin
endothelin的用法和样例：
例句
- The endothelin system is composed of endothelins and endothelin receptors.内皮素系统包括内皮素及其受体。
- Endothelin is a kind of polypeptide generated by vascular endothelial cells and smooth muscle cells.内皮素是一族由血管内皮细胞和平滑肌细胞产生的多肽。
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