For example, in an email to thousands of school-board members asking them to take a survey, cutting the length from 127 to 49 words almost doubled the response rate (from a paltry 2.7% to 4.8%).

例如，给数千名学校董事会成员写电子邮件并邀请他们参加一项问卷调查，当电子邮件的长度从127个字缩短到49个字时，回复率几乎翻了一番(从微不足道的2.7%增加到4.8%)。