一提到时间,同志们立刻会想到时钟和手表。是的,钟表能够告诉我们现在是几点、几分、几秒。但是,钟表不一定准确。您如果对一对两个或更多个钟表的话,就会发现,不是这个快了,就是那个慢了。那么,究竟那个钟表是准确的呢?这就需要有一个共同的时间标准。在日常生活中它就是广播电台或电话局的报时。我们平常就根据 When it comes to time, comrades immediately think of clocks and watches. Yes, the clock can tell us what time it is, a few minutes, a few seconds. However, watches are not always accurate. If you look at one pair of two or more clocks, you will find that it is not this fast or that it is slow. So, what exactly is the clock? This requires a common time standard. In daily life it is the broadcast time of a radio station or telephone exchange. We usually base