4.In the history of human being, in the beginning, people in the east invented manual computing system, such as abacus.
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such as abacus
比如算盘
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Goldman also said it has received subpoenas from unspecified regulators seeking information on the firm's mortgage business and products such as Abacus 2007-AC1, a mortgage-bond deal.
WSJ: Goldman Discloses CFTC Probe
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模块上移
模块下移
不移动