The search for gamma ray point sources is a popular topic in the study of cosmic rays.

点源的寻找是宇宙线研究中的一个热门课题。

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Because of not having a fixed point sources, it was difficult to control non-point sources.

由于没有固定的污染源，控制非点源污染要比控制点源污染困难得多。

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Because of not having fixed point sources, it was difficult to control non - point sources.

由于没有固定的污染源，控制非点源污染要比控制点源污染困难得多。

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The Wine Spectator and the Wine Advocate are the two most powerful point sources in the wine industry, but there are many, many reviewers who use the 100-point system.

WSJ: Wine Ratings: Remaking the Grade | On Wine by Lettie Teague

While those owners may emerge as suspects, sources point out that their computers might have been programmed without their knowledge.

CNN: Graphic

Sources point to numerous other possible nominees as well, including federal appeals court Judges Merrick Garland, Marjorie Rendell, Jose Cabranes, and M.

CNN: Souter news sets off succession speculation