摘要:
a collocation is two or more words that often go together. These combination just sound "right" to native english speaker. 'commit a crime' is a typic 阅读全文
posted @ 2017-07-17 19:34
hahahaf
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摘要:
三种情况: “a” 对应"a", "." 对应 "a" "a*" 对应 “aa” 当p为空,s为空时可以匹配; 若p的第二个字符为*,第一情况为不匹配(b, a*b);从 (b,b)开始匹配 第二种情况为匹配(a, a*); 首元素相同, 从( ,a*)开始匹配 若p的第二个字符不为*, 首字符必须 阅读全文
posted @ 2017-07-17 18:29
hahahaf
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