the state of being or appearing to be actively engaged in an activity
an Islamic fundamentalist group in Pakistan that fought the Soviet Union in Afghanistan in the 1980s; now operates as a terrorist organization primarily in Kashmir and seeks Kashmir's accession by Pakistan
a humming noise
动词 hum:
sing with closed lips
be noisy with activity
sound with a monotonous hum
make a low continuous sound
双语例句
A brief high-pitched humming or buzzing sound, such as that made by a swiftly passing object or a taut vibrating string. 尖啸声一种短暂尖锐的嗡嗡声或滋滋声，例如高速运动的物体和拉紧的震颤的线发出的声音
The earth hums to me today in the sun, like a woman at her spinning, some ballad of the ancient time in a forgotten tongue. 今天大地在太阳光里向我营营哼鸣，象一个织着布的妇人，用一种已经被忘却的语言，哼着一些古代的歌曲。
The only sound he heard was the hum of the machine. 他听到的唯一的声音就是那台机器的嗡嗡声。
A toy instrument with a membrane that produces a sound when a player hums or sings into the mouthpiece. 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
