后来这5艘军舰分成两批，一批是在北安普敦级基础上改进而成，这就是波特兰级（Portland Class）。由于之前建造的彭萨科拉级和北安普敦级排水量低于华盛顿条约的限制标准，所以新舰将有更多吨位可以利用。
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class A Portland cement A级波特兰水泥
portland class
硅酸盐类
以上为机器翻译结果，长、整句建议使用 人工翻译 。
So she started teaching a class at Portland State University.
因此，她开始在波特兰州立大学教课。
youdao
The middle child of Korean immigrants, Kim grew up in a middle-class Portland suburb with a fascination for the way things worked and a can-do attitude.
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The world class sailing venue on Portland is expected to be completed in November.
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