a fence completely enclosing an estate, farm, or piece of land
大围栅。
〈喻〉 (有效或全面的)障碍(或保护、隔离措施)。
enclose (a piece of land) with a ring fence
用围栅围(一片地)。
〈喻〉 严密护卫;保护
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senior civil servants are attempting to ring-fence their jobs .高级公务员们正试图保住自己的工作。
〈喻〉 保证不挪用(专项资金)
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the government failed to ring-fence the money provided to schools .政府没能保证给学校的拨款不被挪用。