stream pressure

• 气流压力

stream pressure的用法和样例：

例句

1. High notes are harder to play than low notes, because the reeds in high holes are much shorter.So they need higher air pressure to librate.So the next step will be your practice.
   高位孔要比低位孔难吹些，因为高位孔里面的簧片更下，需要更大的气流压力来振动，这样就需要你自己去把把握了，嘻嘻！