An inch is a unit of length. 英寸是长度单位。

　　12 inches are the same as a foot, and 36 inches are the same as a yard. 12英寸等于1英尺，36英寸等于1码。

　　How much is one inch in millimeters? 那么1英寸等于多少毫米呢？

　　One inch is equal to 25.4 millimeters. 1英寸等于25.4毫米。

　　The inch's used only in a few countries, such as the United States, Canada and the United Kingdom. 英寸只在几个国家如美国、加拿大和英国使用。

　　All other countries use the meter instead. 所有其他的国家都使用米来代替。