对啊,就是bell,就这么简单.
因为如果你在那样情景下跟对方说bell,对方一定知道你说的上课/下课的铃声.
请特别注意class ring是指一种在美国,很多学生毕业后作为纪念而戴的戒指.
A class ring (also known as a graduate, senior ring, or grad ring) is a ring worn by students and alumni in the United States to commemorate their graduation, generally for a high school, college, or university.