以上来源于: WordNet
N an accidental that lowers the pitch of the following note two semitones 重降号; 表示要降两个半音的记号 (Usual symbol ♭♭)
N a note affected by this accidental 受重降号影响的音调
ADJ denoting a note of a given letter name lowered in pitch by two semitones 音调降两个半音的
I can tell the difference between a flat and a double flat notation.
我可以分别降半音符号与双倍降半音符号之间的区别。
The inner part of a shaft end hole of the backstop is connected with a driven shaft through an expansion bush and a double flat key;
在逆止器的轴端孔内通过胀套和双平键与从 动轴连接；
The Boston-based company had sales growth in the double digits for the past few years, when revenue fell flat last fall.
这家设在波士顿的公司在过去几年里的销售收入一直以两位数字的速度增长，不过在去年秋天，该公司收入却停滞不前了。
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