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。
As the wrigglers develop, the gelatinous outer membrane decomposes, perhaps triggered by a chemical change in the tadpoles.
如同孑孓的生长，凝胶状的外膜分解，也许触及化学变化在蝌蚪。
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