1.1 ranium Uranium in one form or another is by far the most common fuel material for nuclear reactors.不同形式的铀是反应堆中最常用的一种燃 料 by far是加重语气,说明了 the most的程度。 It can be used either as pure uranium, a metal, or as compound such as uranium dioxide uo2 or uranium carbide uc.它可以或者作为 纯铀金属状态使用,或者以化合物的形式,例如二氧化铀或碳化铀,来使 用。 Uranium is a rather soft and ductile metal which oxidizes readily in air and water at high temperature铀是一种很软而且延展性很好的金属, 它在高温时容易在空气和水中氧化 Its melting point is 1133C. It exists in one of three allotropic forms depending on its temperature. These different forms are called the alpha, beta or gamma phase, and changes from one phase to another due to temperature changes are accompanied by density changes.其熔化温度位1133°C,根据其温度,它以三种同素异形体之 的形态存在,这些形态为α,β或者γ相,并且它们之间因温度变化而相互 转化时会伴有密度变化。1.1 Uranium Uranium in one form or another is by far the most common fuel material for nuclear reactors. 不同形式的铀是反应堆中最常用的一种燃 料。 by far是加重语气，说明了the most的程度。 It can be used either as pure uranium, a metal, or as compound such as uranium dioxide UO2 or uranium carbide UC. 它可以或者作为 纯铀金属状态使用，或者以化合物的形式，例如二氧化铀或碳化铀，来使 用。 Uranium is a rather soft and ductile metal which oxidizes readily in air and water at high temperature. 铀是一种很软而且延展性很好的金属， 它在高温时容易在空气和水中氧化。 Its melting point is 1133oC. It exists in one of three allotropic forms depending on its temperature. These different forms are called the alpha, beta or gamma phase, and changes from one phase to another due to temperature changes are accompanied by density changes. 其熔化温度位1133oC，根据其温度，它以三种同素异形体之一 的形态存在，这些形态为a，b或者g相，并且它们之间因温度变化而相互 转化时会伴有密度变化