Permission has not yet been granted for the airline to overfly Tanzania.这家航空公司还未获得飞越坦桑尼亚领空的许可。British paleontologist who worked in Tanzania.在坦桑尼亚工作的英国古生物学家The newly built airport acts as a starting point for safaris into...
黄铜是铜锌合金。Brass is an alloy of copper and zinc.车上装的食品是用铬合金做的.The trimmings on the car are made of chromium.工人在合金里搀了一点铜.The worker worked in a little copper with the alloy....