In separating breeding, two major indicators, cocoon weight and vitality of tussah were selected.

采用系统分离育种方法，对柞蚕全茧重和生命力两项主要指标进行平衡选择。

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This paper studied the biological effect of different dose Ce 3 + on life of fruit fly and silkworm and weight of cocoon.

研究了不同浓度氯化亚铈对果蝇寿命、家蚕寿命及其茧重的影响。

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Finally, while all that mass, weight and size may create a safe cocoon for truck occupants, it can create disastrous mismatches with cars, and even greater consequences for pedestrians.

FORBES: The Most Dangerous Trucks of 2011