To utter in repetition small, sharp, broken sounds, as does a bird.

(如鸟之)啾啾；鸣啭。

To feel a slight nervous excitement or tremor.

【方】(因激动而)颤抖。

To utter in short, broken sounds.

发啾啾声。

A series of short, broken sounds.

啾啾声；啭音。

A nervous trembling.

(由激动引起的)颤抖；紧张。