The first thing a multi-tasking operating system needs from hardware is isolation: multiple programs must share one processor without being able to read, write, or jump into each other's memory. The 80386 achieves this through memory protection -- two independent address translation layers.
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第九条 国务院林业草原主管部门和有关部门、自然保护区所在地县级以上地方人民政府及其有关部门、自然保护区管理机构应当组织开展多种形式的自然保护区保护宣传教育活动。