u组分
基于1个网页-相关网页
u 2 fraction
U 2分数
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Still, they are a small fraction of overall trading, accounting for 2.4% of all U.S. stock trading in June, according to Rosenblatt Securities.
WSJ: Ban on Flash Orders Is Considered by SEC
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