电子钟是一种利用数字电路来显示秒、分、时的计时装置，与传统的机械钟相比，它具有走时准确、显 示直观、无机械传动装置等优点，因而得到广泛应用。随着人们生活环境的不断改善和美化，在许多场合可以看到数字电子钟。
当代的便携电子钟大约有一个扑克牌盒那么大。
The current generation of portable atomic clocks is roughly the size of a pack of playing CARDS.
墙上挂着一个电子钟，每隔24秒跳一个字，数字就增加一个。
The wall was hung with an electronic clock jumping one character every 24 seconds and increasing the displayed number one by one.
墙上挂着一个电子钟，每隔24秒跳一个字，数字就增加一个。
The wall was hung with an electronic clock, jumping one character every 24 seconds and increasing the displayed number one by one.
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