+export CC_WRAPPER=/usr/bin/ccache
a naive implementation of derivatives would need to compute a transition for every possible character (up to 65536 in UTF-16). minterms fix this by partitioning the character space into equivalence classes where all characters in a class behave identically.
。PDF资料是该领域的重要参考
"In Venezuela, you're dealing with equipment that's been degraded by many years of neglect," says Jackson. "Ten to 15 years ago, Venezuela was producing 1.5 million barrels a day more than it does today."
Андрей Ставицкий (Редактор отдела «Наука и техника»)