电子提单在实践中的流通需要有一定的条件：功能等同和优越性的发挥。
The practical circulation of the EBL needs certain conditions: functional equivalent and the exertion of its superiority.
第三章为等同原则的实践。
当前的金矿物统计工作大多局限于颗粒数百分比计算，而且常常把粒数比简单地等同于重量比，这在理论上和实践上均是错误的。
The current statistics of gold minerals is confined to the calculation of percent of grains, which is a mistake in theory and practice.
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