trills
n. [声]颤音（trill 的复数）
v. 用颤声说（trill 的第三人称单数）
例句
Dolphins lack vocal cords, nevertheless creating sounds: a complicated system of whistles, squeaks, moans, trills, and clicks are produced by sphincter muscles inside the blowhole.
海豚没有声带，但却能发声：一个由口哨声、吱吱声、呻吟声、颤音和咔嚓声组成的复杂系统是由喷水孔内的括约肌产生的。
Nearby, women responded with high-pitched trills.
在附近,女人则用尖锐的花舌颤音作为回应。
Mutual respect… she laughs and trills and she sings when she speaks.
她的笑声带着颤音，说话像在唱歌。
