这共晶成分的熔化温度低于操作温度.This eutectic composition has a melting temperature lower than the operating temperature.对共晶硅形态的变化机理也作了初步探讨.The mechanism of this change also was researched preliminarily.本文设计了 Nb -Si基共晶自生复合材料的成分体系,并采用真空...
欧洲的一种芬芳的象叶藜属植物,花呈黄色至绿色; 在北美归化.Eurasian aromatic oak - leaved goosefoot with many yellow - green flowers; naturalized North America.欧洲的一种藜属植物,叶具有强烈的气味; 被引入北美东部.European goosefoot with strong - scented foliage; adventive i...
We are going to celebrate our granduncle's eightieth birthday.明天我们要给舅爷过八十大寿....his eightieth birthday celebrations.他80大寿的庆祝活动All our family came to our grandfather's eightieth birthday party.我们全家和所有的亲戚都来参加祖父的八十...