标准米在应用上十分成功，虽然很晚时候人们才发现其长度比经线短了0.23毫米。
The standard meter fulfilled its duty perfectly, although its length has been found much later too short by 0.23mm with respect with the meridian.
他们选取了经英国格林威治的经线作为标准线(这各标准已经被海员使用了几个世纪了)。
They selected the longitudinal line that runs through Greenwich, England, as the standard from which they would measure (it had already been used by sailors for centuries).
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