He was involved in oil, zinc and lead prospecting.他参与了石油、锌和铅的勘探。Brass is an alloy of copper and zinc.黄铜是铜锌合金。the fusion of copper and zinc to produce brass铜与锌熔合成黄铜...
Realized abecedarian industrialization through considering to develop and introduce a technology independently.通过独立研究开发和引进技术实现了初步的产业化.The article makes one abecedarian research at this point only.本文仅就此作一初步的研究.What fund h...