渐弱

The sounds grew fainter.

声音渐弱。

The song of the oyster, though not silenced, was diminuendo con amore.

牡，虽然还未沉寂，已渐唱渐弱。

The mood changes abruptly after six or seven bars of wayward decrescendo.

六七个小节长时间的渐弱后，音乐的情绪然改变了。