It is recounted of Thomas Carlyle that when he heard of the illness of his friend, Henry Taylor.
据说托马斯·卡莱尔有过这么一件事：他听说朋友亨利·泰勒病了。
The research on design method and test for low specific speed impeller are recounted specifically. It is of very importance to further develop and use in low-flow chemical centrifugal pumps.
着重叙述了低比转数叶轮的设计方法、试验研究，对进一步开发、应用小流量化工用离心泵具有重要指导意义。
Ammonium molybdate is the most important material. It was recounted that ammonium molybdate is key to improve the quality of molybdenum bars.
钼酸铵是钼条生产的重要的原料，简述优质钼酸铵是使钼条质量得以提高的关键。
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