School bell
01
学校铃声, 校钟
a mechanical or electronic device used to signal the start and end of classes or periods in a school day
例子
The school bell rang, signaling the end of recess and the start of the next class.
学校铃声响起，标志着课间休息结束，下一节课开始。
The students lined up in the hallway when they heard the school bell indicating the end of lunch.
学生们在走廊里排队，当他们听到学校的铃声表示午餐结束时。
