The heated ion vibrates at a slightly different frequency, making the clock a little less accurate.
受热的离子振动频率细小的差别，使得时钟有点不准确。
One residual obstacle to practical applications that is likely to be overcome is the fact that glassy metals will crystallize at relatively low temperatures when heated slightly.
剩下的障碍，对于实际应用来说，一个有可能被克服的障碍，是下面的事实，玻璃金属将会结晶，在相对低的温度下，当被稍微加热的时候。
These materials will be expanded after being heated slightly (usually it is called thermal expansion), or shrink during the cooling.
这些材料在轻微受热时也会膨胀(通常称为热膨胀)，或在冷却时收缩。
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