Definition: an electrical object that makes a ringing sound when you press a button Level: B1
如果您需要帮助，请按铃。
If you need help, please ring the ___bell.
她正在看书时，门铃响了。
She was reading a book when the door ___bell rang.
请按下铃并等待帮助。
Please press the ___bell and wait for assistance.
