The radio crackled into life.

收音机嘎嘎地响了起来。

The radio crackled again.

收音机又吱吱地响了起来。

The atmosphere crackled with tension.

气氛顿时紧张了起来。

Suddenly a bolt of lightning crackled through the sky.

突然，一道闪电划破天空。

The sky, swollen like a black bladder, rumbled and crackled.

天空胀得像个黑色的气囊，发出隆隆声和劈啪声。