夕阳慢慢消失在地平线上。

The sunset ___faded out slowly on the horizon.

音乐在结尾处慢慢淡出，营造出柔和的结束氛围。

The music ends with a gentle ___fadeout, creating a soft closing atmosphere.

随着时间流逝，他对音乐的热情逐渐消退。

His passion for music ___faded out over the years.