转为草料饲养是一个安全的避难方法，是家庭规模农场维持生存的一种方式。
Going grass-fed is a safe refuge, a way for family-scale farms to stay viable.
在这个实验室中，生物学家Joan Lindberg饲养了几千条的三角洲胡瓜鱼，这个人工繁育计划旨在形成一个可能的安全网，防止这种鱼类灭绝。
There, biologist Joan Lindberg is raising thousands of delta smelts in a captive-breeding program as a possible safety net against extinction.
饲养、屠宰和加工技术的开发和转让提高了安全性和效率，但更有利于大规模的养殖场而不是小规模的养殖者。
The development and transfer of feed, slaughter and processing technologies have increased safety and efficiency, but favour large-scale units rather than small-scale producers.
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