这是我的解决方案：
mkdir tempmkdir resultscp /usr/share/dict/american-english ~/temp/american-english-dictionarycp /usr/share/dict/british-english ~/temp/british-english-dictionarycat ~/temp/american-english-dictionary | wc -l > ~/results/count-american-english-dictionarycat ~/temp/british-english-dictionary | wc -l > ~/results/count-british-english-dictionarygrep -Fxf ~/temp/american-english-dictionary ~/temp/british-english-dictionary > ~/results/common-englishgrep -Fxvf ~/results/common-english ~/temp/american-english-dictionary > ~/results/unique-american-englishgrep -Fxvf ~/results/common-english ~/temp/british-english-dictionary > ~/results/unique-british-english
