名词
中文翻译：外部时钟
同义词：
['outside clock', "external timepiece例句：1. The external clock on the wall shows that it's already past midnight.（墙上的外部时钟显示已经过了午夜。）"]
例句：
-
1. The external clock on the wall shows that it's already past midnight.
墙上的外部时钟显示已经过了午夜。
-
2.The external clock was set to 9:00 AM and everyone arrived early.
外部时钟被设置为早上九点，大家都提前到了。
-
3. We need to check the external clock before leaving the building.
在离开大楼之前，我们需要检查外部时钟。