Spiders usually have silk glands under their abdomen.

蜘蛛通常在腹部下有丝腺。

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Spiders do not take well to farming, and as they are mostly teeny little creatures, they don't produce enough silk to be useful in large-scale production.

蜘蛛不适宜大规模养殖，而且由于蜘蛛多为微小的生物，所以它们产出的蛛丝不足以用于大规模生产。

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This amazing silk is also used to create lines that spiders hang onto as they travel to new areas.

这种神奇的蛛丝还可以用来制造线绳，使蜘蛛在前往新区域时能紧紧抓住。

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But spiders make silk,too.

VOA: special.2009.10.30

The silk gland of spiders and the milk gland of goats are almost identical.

FORBES: Charlotte's Goat

The graphics look impressive enough, running on the Silk Engine developed by Spiders.

FORBES: Connect

This way of spinning silk is remarkably similar to that used by spiders, which pull the material from their bodies using their legs.

ECONOMIST: A species of crustacean makes silk underwater