Using calcium chloridize and sodium phosphate dibasic, this paper synthesizes hydroxyapatite having hexagonal system at 40 ℃.本文以氯化钙和磷酸氢二钠为原料,在40℃温度下合成了具有六方晶系的羟基磷灰石.Under proper condition the dibasic alcohol and bisphenol...
For years he was a boffo box office certainty.多年来,他一直是票房收入的保证.There is too little certainty about the present state of the German economy.德国当前的经济非常不稳定。It is impossible to say with certainty what Ichthyostega was doing as...
虽然这是一场艰苦的斗争，但我相信我们会取得胜利。It's an uphill battle but I think we're going to win.不管结果如何，这都会是场艰苦的战斗。Whatever the outcome, it's going to be one hell of a fight.他发现这次旅行非常艰苦。He found the rigours of the tour too de...