standard input file

例句：

1. 1. The standard for measuring the length of a ruler is 20 cm.
   测量尺子长度的标准是20厘米。
2. 2.The company's policy on customer service is to provide excellent service as standard.
   公司对客户服务的政策是提供优秀的服务作为标准。
3. 3. The new product has been designed to meet international standards.
   新产品已经设计成符合国际标准。