Gb	Eng
她一遍又一遍地不断哼唱那支歌。	She continued to hum the song over and over.
卡祖笛一种当吹奏者向吹口处低吟或哼唱时一个膜能够发出声音的玩具乐器	A toy instrument with a membrane that produces a sound when a player hums or sings into the mouthpiece.