分级进给
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feed by stages
分级进料
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The objective of this study was conducted to determine the activities of digestive enzyme and their effects by compound feed during different growth stages of Portunus trituberculatus.
本研究旨在确定三疣梭子蟹各生长阶段的消化酶活性变化规律和配合饲料对消化酶活性的影响。
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