每笔交易他们要挣双倍的钱，这就解释了为什么频繁同步行动的交易商是公司里的最好的交易商。
They also made nearly twice as much money per trade, which explains why traders who frequently "sync up" were the best performers at the firm.
不要点双层汉堡包！原因简单但非常合理：为什么要摄入双倍卡路里呢？
Don't order a double burger! So simple, but so sensible. Why double the calories?
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