2. Large volcanic eruptions spread cooling palls through the stratosphere. 火山大爆发将厚重的火山灰铺到了平流层。
3. This essayis to be divided into four palls to discuss the process of the Chinesemodern writers' acceptance and re-creation of Nora. 本文将分四部分论述中国现代作家对娜拉形象的接受与再创造的流程。
4. Large volcanic eruptions spread cooling palls through the stratosphere. Techniques for doing something similar in a less dramatic way are plausible. 例如大的火山爆发会通过同温层喷发出冷却的烟雾,基于实际的类似技术是令人鼓舞的。