Centered on the abstract category of tense and aspect, a detailed survey is carried out as to the prototype effects in the categorization of the system.
本文以英语时态范畴为视点，对英语时态系统范畴化过程中的原型效应展开了详细的调查研究。
Early Monday, the National Hurricane center said Gustav was a Category 3 storm centered about 175 miles southeast of the mouth of the Mississippi River and moving northwest near 17 MPH.
周一早些时候，美国国家飓风中心宣布“古斯塔夫”为3级风暴，中心大约位于密西西比河河口东南175英里，以接近17英里的时速向西北方向移动。
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