1. The house was filled with the cello's dismal squeaks and groans. 房子里回荡着大提琴低沉而凄厉的声音。
2. 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。