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。
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.
一直以来，人们都对批量生产的食物和加工过的食物表示担忧，对大规模养殖的鱼类也是如此。
There have long been concerns about farmed fish, just as with other massed produced and processed foods.
本文对北方典型贝类大规模养殖海湾桑沟湾进行了其海水与沉积物之间氮、磷和有机质的垂直通量进行了初步的研究。
The natural sedimentation affected by biodeposit production and the flux between the seawater and sediments are also concerned in this paper.
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