gzip(也称zip或zlib)所使用的算法是开源、无专利的LZ77 (Lempel - Ziv 1977)算法的变体。
The deflation algorithm used by gzip (also zip and zlib) is an open-source, patent-free variation of the LZ77 (Lempel-Ziv 1977) algorithm.
无品牌非专利药会使药品竞争异常激烈，以美国为例，某专利药在保护期到期后的一年内其价格降幅会超过85%。
Where competition from unbranded generics is fiercest, for instance in America, the price of a given drug falls by more than 85% within a year of patent expiry.
一如其他科技公司，苹果同样遁交了大量产品的专利申请，有些产品推出前会大幅修改，有些什至消失得无影无纵。
The company, like other technology manufacturers, have filed numerous patents on products that either change drastically before they actually hit the market or that disappear altogether.
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