The balloons dissolved high in the sky.

气球高空中渐渐消失。

The sounds fainted away in the distance.

声远处渐渐消失。

The shapes faded (away) into the night.

这些夜色中渐渐消失。

Your hunger decreases as you eat.

饥饿感吃饭时会渐渐消失的。

The laughter died down.

声渐渐消失了。

The noise gradually faded away.

喧闹声渐渐消失了。

When you turn on a transistorized radio, the sound comes on immediately; when you turn off, it fades out gradually.

你打开晶体管, 立刻就有声, 当你关掉它时, 声渐渐消失。