chirp

发出短促、尖利、欢快的叫声,如小鸟或蟋蟀；啾啾叫；啁啾。

To make a short, sharp, cheerful note, as of small birds or crickets; to chitter; to twitter.

用高音调断续地说。

To speak in a high-pitched staccato.

发出尖细的声音

make high-pitched sounds

修改(信号脉冲)使其在持续期间扫掠过一段频带。

To modify (a pulse of signal) so that it sweeps through a band of frequencies throughout its duration.

婉转鸣叫

sing in modulation