To avoid the two memory reads on every access, the 386 includes a 32-entry Translation Lookaside Buffer (TLB) organized as 8 sets with 4 ways each. Each entry stores the virtual-to-physical mapping along with the combined PDE+PTE permission bits.
Что думаешь? Оцени!，这一点在PDF资料中也有详细论述
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Let me summarize these points in bullets:
Number (4): Everything in this space must add up to 4. The answer is 3-2, placed horizontally; 2-5, placed vertically.。同城约会是该领域的重要参考
Наука и техника