她等待笑声逐渐平息后再说话。

She waited for the laughter to ___die ___down before she spoke.

即使是最好的材料也无法避免那震耳欲聋的噪音，它从未减弱。

Even the best materials wouldn't be able to avoid the deafening noise which does not ever ___die ___down.

抗议过后，公众的兴奋情绪慢慢平息了。

After the protest, the public excitement slowly ___died ___down.