在这里，他们试验的是按需印刷，在订购之前人们可以先阅读电子书。
What they are experimenting with here is on-demand printing, where people pre-read an e-book before placing an order.
供货方在交货时应向订购方提供至少二份完整的钢管质量合格证书和试验数据报告，要求按SA688/SA688MS3的规定。
The supplier shall furnish at least two complete U-tube Quality Certificate and Test Data Reports according to the requirements of SA688/SA688M S3.
必须对那些过去没有采购记录的供应商进行样品检查和小部分订购试验。
Inspection of samples and trial orders of small quantities might be used with suppliers for whom there is no previous purchasing record.
在这里，他们试验的是按需印刷，在订购之前人们可以先阅读电子书。
What they are experimenting with here is on-demand printing, where people pre-read ane-book before placing an order.
本文探讨四个个案的历史，说明有关的一些问题订购试验和困难，调查结果可以产生。
This article examines four case histories that illustrate some issues related to the ordering of tests and the difficulties that investigation results can produce.
瓦格宁根大学以2000欧元（2285美元）的高价从NASA订购了100千克（220磅）的模拟“太空土”，于2013年开始进行第一次试验。
The first experiments started in 2013 after Wageningen received an order of 100 kilograms (220 pounds) of NASA's imitation "space soil"—at a hefty price of 2,000 euros ($2,285).
这是一个小批试验性订购。
这是一个小批试验性订购。
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