为了刺激经济，中央银行降低了利率。

To stimulate the economy, the central bank ___lowered interest rates.

煮沸后，记得调低火力让它用文火慢炖。

After boiling, remember to ___lower the heat to let it simmer.

你能把声音放低一些吗？宝宝在睡觉。

Could you please ___lower your voice? The baby is sleeping.