在微风中,花瓣轻轻摇曳。亲密情人之无限诱惑
更新时间:2025-12-02 11:31:34 | 人气:918661 | 作者:班矛, |
Human hearing is capable of detecting sound waves between 20 and 20.000 Hz. ... merely a small fraction of the frequency spectrum. Most sounds around us go unnoticed.

更新时间:2025-12-02 11:31:34 | 人气:918661 | 作者:班矛, |
Human hearing is capable of detecting sound waves between 20 and 20.000 Hz. ... merely a small fraction of the frequency spectrum. Most sounds around us go unnoticed.
