啭

例句：

1. 1.The bird uttered a soft chirp to attract its mate.
   这只鸟发出了轻柔的叫声来吸引它的伴侣。
2. 2. Thecat purred softly as it settled downfor the night.
   猫轻轻地发出呼噜声，准备睡觉。
3. 3. The doves werebusy tweeting their way through the morning.
   小鸽子们忙着在清晨发出叽叽喳喳的声音。