1·They are truly lumps of nebular matter, probably similar in composition to the matter from which planets were assembled.
它们的确是星云物质组成的团块，其组成物质可能与行星形成时的物质相似。
2·At one time it was thought that these matrix grains might be pristine nebular dust, the sort of stuff from which chondrules and inclusions were made.
曾经有人认为，这些基质颗粒可能是原始的星云尘埃，即形成陨石球粒及其内含物的物质。
3·Wu Tongchun's nebular art is expressed by the character of traditional Chinese painting.
吴同椿的星云世界是用中国画的特色来表现的。
4·The magnitude of the turbulence then follows directly from the observed line with if the nebular gas temperature is known.
如果已知星云气体的温度，则湍流的大小可直接从观测的谱线宽度得出。
5·If a protoplanet was large enough, soon enough, its gravity would pull in the nebular gas, and it would become a gas giant.
如果一个原行星足够大，形成足够快，它的重力会拉入星云的气体，它就会变成一个巨型气体行星。