Practically speaking, the pipe can't be smoked. It is merely a paintings an image.

从实用的角度上说，这烟斗是不能用来抽烟的。它只是一张画，一个形象而已。

youdao

And the answer has to do with ratios and string sizes and lengths of pipe and things like that, but generally speaking, pitches that are right next to each other--very close to each other--are dissonant.

答案和比率以及弦乐器的尺寸和管乐器的长度等有关，但是总的说来，音调是相关联的，非常近。

耶鲁公开课 - 聆听音乐课程节选