belt cloud system

基本解釋

Normal comets fall into the inner regions of the solar system from icy reservoirs in the distant Kuiper belt and Oort cloud.
通常來說，彗星來自距離遙遠(yuǎn)且冰天雪地的柯伊伯帶和奧爾特星雲(yún)然後掉入太陽系中的內(nèi)層區(qū)域。
The Oort cloud is a vast belt of dust and ice that is believed to lie around one light year from the Sun and is the origin of many of the comets that pass through our solar system.
奧爾特雲(yún)是一個由粉塵和冰組成的龐大雲(yún)帶，據(jù)信它距離太陽約一光年，許多穿越我們太陽系的彗星都來自那裡。
www.chinadaily.com.cn