There, biologist Joan Lindberg is raising thousands of delta smelts in a captive-breeding program as a possible safety net against extinction.

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。

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For decades, policy wonks on the Republican fringes had talked about turning Social Security, the government safety-net program for retirees, into a system of private investment accounts.

NEWYORKER: Fussbudget

Then there is Medifund, a safety-net program for the bottom 10 percent of income earners, and Eldershield, a private insurance program for long-term care for those with old age-related disabilities.

FORBES: The Myth of 'Free-Market' American Health Care