1.The deleterious ingredients in gas emission of sculpturing organic glass were studied,using gas chromatography-mass spectrometry coupled with 3-step preconcentrator.
4.The action of flowing ice, whether in the form of river-like glaciers or broad mantles, especially the part it played in sculpturing the earth, is as yet but little understood.
5.Then over the bald, featureless, fire-blackened mountains, glaciers began to crawl, covering them from the summits to the sea with a mantle of ice; and then with infinite deliberation the work went on of sculpturing the range anew.