They argue that the predictable leaf diet of silkworms B. mori permits the production of a silk of uniform composition across the species, while spiders may be constrained by the proteins available from their most recent prey.
【参考答案】他们认为家蚕（B. mori）的可预测的叶子饮食习惯使得其产出的丝具有统一的成分，而蜘蛛可能受到其最近捕食的猎物所提供的......
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