The deleterious ingredients in gas emission of sculpturing organic glass were studied,using gas chromatography-mass spectrometry coupled with 3-step preconcentrator.
研3阶段预浓缩相色谱-质谱法检有机玻璃在雕刻过程中排放的有体的组成。
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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.
然后,的、毫无特色的、被火烧黑的山脉上,冰川开始爬行,从山顶到大海覆盖着一层冰。然后经无限深思熟虑,重新雕刻该系列的工作继续进行。