The infrared image reveals that this dark cloud, called M17 SWex, is forming stars at a furious rate but has not yet spawned the most massive type of stars, known as O stars.
红外成像揭示了这片叫做M17SWex的深色的云正在疯狂地制造新星，但是质量最密的O型星还没有孵出来。
Based on the analysis of hydrocarbon migration modes, the reservoirs forming mode is built up, then the characters o...
在缓坡带油气运移方式分析的基础上，建立了相应的成藏模式，并讨论了缓坡带油藏的形成与分布特点。
The influences of preparation method, the calcined temperature and auxiliary forming reagent on the activity of the Fe Mo Co o catalyst for oxidation of methylal to formaldehyde were studied.
考察了制备方法、焙烧温度和成型助剂对甲缩醛氧化制甲醛铁钼钴三元催化剂活性的影响。
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