air column

• 空气柱

air column的用法和样例：

例句

1. The longer the pipe is, the longer the air column is, and consequently its inherent frequency and resonating frequency along with tone are low too.
   管子长，空气柱也长，其固有频率和与噪声共振的频率亦低，声调就低。
2. Air flows from a reservoir up past leather-covered wooden pallets into pipes of various lengths, vibrating to produce different pitches.
   气流由储风槽通过以皮革包覆的木制调节瓣，进入长度不同的音管，振动空气柱发出不同的音高。