Speculators must study and judge the prices of the market if they want to make money.

投机者要能赚到钱必须对市场的价格有研究，有判断。

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Prosecutors told the judge they were surprised by the new development and needed time to study the software program.

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Her science background helps her predict whether or not drugs will win approval and she's able to judge the risk reward profile based upon the current midstage clinical study.

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