The principal constituent of protein food is albumen.

蛋白食物的主要成份是蛋白.

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The findings indicated that the principal constituent of this strain producing gelatinous membrane is bacterial cellulose.

研究结果表明该菌所产凝胶膜的主要成分是细菌纤维素.

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Principal constituent: Andrographis Paniculta lactone, clove oil and many kinds of sterilizations active factor.

主要成分: 穿心莲内酯 、 丁香油和多种杀菌活性因子.

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