key

钥匙, 键, 解答, 关键, 要害, 基调, 线索, 答案, 暗礁

metal device shaped in such a way that when it is inserted into the appropriate lock the lock's mechanism can be rotated; something crucial for explaining; pitch of the voice; any of 24 major or minor diatonic scales that provide the tonal framework for a piece of music

调音, 锁上, 提供线索

使用钥匙

禁区