Chapter Three is an introduction to English neologisms, including their definition, sources and word-formation.
在第三章中，作者对英语新词的定义、来源，及构词方法作了简单的介绍。
Ac cording to their formation mechanisms, the blowhole defects are divided into four sorts including wrapped-in blowhole, penetrating blowhole, separating blowhole and reaction blowhole.
按发生机理分类，铸件气孔分为裹入气孔、侵入气孔、析出气孔和反应气孔四类。
Ac cording to their formation mechanisms, the blowhole defects are divided into four sorts including wrapped-in blowhole, penetrating blowhole, separating blowhole and reaction blowhole.
按发生机理分类，铸件气孔分为裹入气孔、侵入气孔、析出气孔和反应气孔四类。
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