3.Language and age It has been noticed that in many communities the language used by the old generation differs from that used by the younger generation in certain ways. 一何兆熊《新编简明英语语言学教程》P1173.Language and age • It has been noticed that in many communities the language used by the old generation differs from that used by the younger generation in certain ways. —何兆熊《新编简明英语语言学教程》P117