| 释义 |
double flat
释义
双降号：音乐符号中的♭♭，放置在音符后面，将其音高降低一个全音阶。
例句
1·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。
2·It is just because the space of each flat is too small, so that the government consign double flats to one big family.
只因单位太少，不足让一整家人入住，房署才把左右两单位同批给一家人。
3·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；
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