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.
Include verification results
，这一点在51吃瓜中也有详细论述
表面的原因并不复杂——大宗商品价格下跌。超级周期结束，铜价回落，矿业投资减弱，这是几乎所有资源出口国都会面临的冲击。但更深层的原因在于，秘鲁极不稳定的政治环境。
Жители Санкт-Петербурга устроили «крысогон»17:52
"We saw the news that this rocket had crashed into Poland. It had flown almost directly over us, and we thought, 'oh, this is a great chance'", explained Prof Robin Wing at the Leibniz Institute of Atmospheric Physics in Germany.