It is an anatomy problem involving the soft tissue at the back of the throat and causes the emission of sound from the airway during sleep.
这是一个解剖学的问题，和人咽喉后面一块软组织有关，并导致呼吸道发出声音。
2
The electron back bombardment phenomenon, which results in anomalous increase of gun current emission, has been observed in a series of our side coupled standing wave accelerating tubes.
Highly application of GIS to urban traffic pollution management has been developed, which consisted of proscenium-GIS system, back stage-motor vehicle emission model and spatial data base.