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In 1995 Richard Stallman, a well-known critic of the patent system, testified in Patent Office hearings that, to test the system, a colleague of his had managed to win a patent for one of Kirchhoff's laws, an observation about electric current first made in 1845 and now included in virtually every textbook of elementary physics.
B. laws, which was an observation about electric current first made in 1845 and it is
E. laws that was an observation about electric current, first made in 1845, and is 裡面的
A of B, which… A of B that… 这两个的which that究竟是分别指的是A还是B还是未知呢?
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发表于 2015-1-25 18:25:45
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