Yet no matter how much this valuable stamp is bought and sold, no owner can match the thrill that W. T. Robey had on that day in 1918 when he made America's luckiest stamp find!
不论这种价值极高的邮票卖多少钱、买多少钱，没有一个所有者的兴奋可与罗比在1918年发现最幸运的美国邮票那天的兴奋相比！
The article compares the accuracy among three mathematical models for calculating the change of W. t during sink drawing and explains the method of assessing models accuracy.
比较了三个计算空拔管壁厚变化数学模型的精度，阐述了评定模型精度的方法。
Operate the physical-chemical and the biological w. w. t. plant by computer aided process control system (visualisation).
通过可视化计算机辅助过程控制系统操作物化废水处理系统。
Operate the physical-chemical and the biological w. w. t. plant by computer aided process control system (visualisation).
通过可视化计算机辅助过程控制系统操作物化废水处理系统。
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