格林尼治（平均）时坐标。这是格林尼治平均时，被调整到秒的整数值，它异于国际原子时。（参考）
UTC Universal Time Coordinated. This is Greenwich Mean Time, adjusted to be an integral number of seconds different from International Atomic Time.
格林尼治（平均）时坐标。这是格林尼治平均时，被调整到秒的整数值，它异于国际原子时。（参考）
UTC Universal Time Coordinated. This is Greenwich Mean Time, adjusted to be an integral number of seconds different from International Atomic Time.
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