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-scaleproduction.
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。
2
Heirloom seeds come from plants that were traditionally grown in human populations, as opposed to the seeds used for large-scale agricultural production.
传家宝种子来自传统的人类种植的植物，而不是来自用于大规模农业生产的种子。
3
For one thing, not every great idea that works in a lab can be replicated on a mass productionscale.