Create a new group operator that will group PCSTransform output.
创建一个新的group操作符，它对PCSTransform的输出进行分组。
The CME Group, operator of the Chicago Mercantile Exchange, is one of the world's largest traders of derivatives.
芝加哥商品交易所的运营商CME集团是全球最大的衍生品交易商之一。
The CME Group, operator of the Chicago Mercantile Exchange, is one of the world's largest traders of derivatives.
芝加哥商品交易所的运营商CME集团是全球最大的衍生品交易商之一。
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