例句：
First, the expression must match all letters that need to be capitalized.
首先，表达式必须匹配所有需要大写的字母。
Towns in the Northern colonies were centralized and compact.
北方殖民地的城镇是集中而紧凑的'。
Without unwritten rules civilized life would be impossible.
没有不成文的规章，就不会有文明生活。
Such behaviour is totally unacceptable in a civilized society.
这种行为在文明社会是完全不能接受的。
