与之对照，IPv 6采用了128位地址，可以分配出数十亿个新地址——专家估计，这足够为地球上每棵草的所有叶片分配独一无二的地址。
By contrast, IPv6 USES 128-bit web addresses, creating billions of possible new web addresses - experts estimate it could assign a unique address for every blade of grass on the planet.
大约有40亿个IPv4地址，二进制的IP地址的长度是32位，可以有这么多不同的组合。
There are about 4 billion IPv4 addresses, because the length of the addresses in binary form — 32 bits — allows for that many possible unique combinations.
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