When it is struck, a tuning fork produces an almost puretone, retaining its pitch over a long period of time.

音叉被敲击时，产生几乎纯质的音调，其音量经久不衰。

youdao

When it is struck, a tuning fork produces an almost puretone, retaining its pitch over a long period of time.

音叉被敲击时，产生几乎纯质的音调，其音量经久不衰。

youdao