1. 写回法：(C) 只能用于写回法(Write back)中;虚地址中的部分位与快表中的标志域(tag)进行比较,有一个Cache在总线上发现另一个Cache发出的注销(Invalidate)某块的信号,控存都做到处理器(CPU)芯片上,控存空间就不会宽裕,如果因此

1. 写回信
If you write back to someone who has sent you a letter, you write them a letter in reply.

e.g. Macmillan wrote back saying that he could certainly help...
麦克米伦回信说他肯定能帮忙。
e.g. I wrote back to Meudon at once to fix up a meeting.
我马上给缪顿回信安排会面。