同样，只要处理器利用指令地址，低阶的两位就为零。
Similarly, whenever the processor develops an instruction address, the low-order two bits are zero.
论文表明，对给定的目标谱，存在一最低阶的ARMA模型。
It is shown that an ARMA model of minimum order exists for a given target spectrum.
因此，只要将指令地址提供给处理器(如Branch指令)，就会忽略低阶的两位。
Thus, whenever instruction addresses are presented to the processor (as in Branch instructions), the low-order two bits are ignored.
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