vi.

1. （小鸟）发啁啾声；（昆虫）发唧唧声[（+away）]
   Birds had begun to chirp and twitter among the trees.

   鸟儿开始在树丛中啁啾鸣啭。

2. 嘁嘁喳喳地说话
3. 咂嘴打招呼

vt.

1. 尖声尖气地说（或唱）[（+out）]
2. 咂嘴向……打招呼

n.[C]

1. 啁啾声；唧唧声
   She heard nothing but the chirps and whirrs of insects.

   除了虫的鸣叫声外，她什么也没听见。

2. 嘎吱声

v.

1. (of a small bird or a grasshopper) utter a short, sharp, high-pitched sound.
2. say something in a lively and cheerful way.

n.