标题（Title） 一般不超过80个字符
Calculator Source - Effective Calculating Solutions, Best Brands, One Place
（75 个字符）
关键词（KeyWords）一般不超过100个字符
calculator,graphing calculator,construction calculator,real estate calculator,calculated industries,stokes publishing,ti,math calculator,texas instruments,hp,casio,accounting calculator,overhead calculator,teacher,electrician,student,construction,boating,pilot,timecard,payroll,accounting,do-it-yourself
（303 个字符）
描述（Description）一般不超过200个字符
（0 个字符）
