The emergence of superconductivity in certain metals when cooled below a critical temperature is an example of a phase transition.
当温度降至临界温度以下，某些金属会突然失去电阻，出现超导现象，这就是相变的一个例子。
A superconductor's transition temperature and critical current density are two commonly measured parameters.
超导体的转变温度和临界电流密度是两个经常要测量的参数。
At a critical temperature, vanadium oxide films undergo phase transition between metal phase to semi-conducting phase.
在某一特定的温度处，氧化钒薄膜发生金属-半导体相的转变。
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