环可供这种环移动的绳子 、 竿子或圆材.The rope, rod, or spar on which such a ring moves.滑环在一根绳 、 杆子或圆材上可以自由来回移动的金属环.A metal ring that moves freely back and forth on a rope, rod, or spar.桅杆: 一种垂直圆材或杆,用来悬挂船帆.Mast: A vertical spar or pole to...
黄铁矿很多,并且含钴,在硫化物块体中成稠密的斑块.Pyrite is more abundant and cobaltiferous and occurs in heavy patches in the sulfide mass.喷气发动机中65%的特殊耐热金属材料是用钴制造的.Sixty - five percent of the special heat resistant metal in a jet engine is made...
Two men tried to hijack a plane on a flight from Riga to Murmansk...两名男子试图劫持一架从里加飞往摩尔曼斯克的飞机。Two men tried to hijack a plane on a flight from Riga to Murmansk.两名男子试图劫持一架从里加飞往摩尔曼斯克的飞机。Every minute during the hijack seemed ...