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🕰️ is a clock emoji. It can represent the time - measuring tool of a clock. It is usually used to represent time - related concepts, such as waiting for a certain moment, setting the time, checking the time, etc. It can also, in some cases, represent contents related to time management and schedule arrangements, for example, to remind people to pay attention to the passage of time or the time point at which an event occurs.
When I was waiting for the bus, I looked at my watch 🕰️ and found that the bus had been delayed for a long time.
When studying in the library, I set the alarm on my mobile phone 🕰️ to remind myself to take a break.