探讨分子射线源中气体性质的变化。
The change of the characters of gas in the source of molecular ray is studed.
射电星系同时也是强的红外源和X射线源。
Radio galaxy is also a strong red external source and X-ray source.
一些射线源较弱，它的性质和距离都仍然未知。
The nature and even distance to some of the fainter sources remain unknown.
用于泡沫材料密度测量的X射线源是特制的激发源。
The X-ray source used in this experiment is particularly prepared.
用于泡沫材料密度测量的X射线源是特制的激发源。
The X-ray source used in this experiment is particularly prepared.
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