n. 钥匙, 键, 解答, 关键, 要害, 基调, 线索, 答案, 暗礁
vt. 调音, 锁上, 提供线索
vi. 使用钥匙
[计] 键, 密钥
英文释义
n. metal device shaped in such a way that when it is inserted into the appropriate lock the lock's mechanism can be rotated
n. something crucial for explaining
n. pitch of the voice
n. any of 24 major or minor diatonic scales that provide the tonal framework for a piece of music