中游

The paper highlighted the existing situation of soil gleying and swamping,thecause and harm of soil waterlogging.

讨论了长江中游地区土壤潜育化沼泽化现状,土壤渍害原因及其危害,并总结提出了些改良措施。

It is a tiny joyrider from the rubble stream surrounding the solar system that broke free and orbits the sun in a tilted, elongated orbit.

它是从围绕太阳系而堆剩余物中游走出来颗星。它体积微小，以倾斜、细长轨道围着太阳运转。