"红卡"是个多义词，它可以指红卡（湖南红网）,红卡（游戏道具）。
它们无法知道其中红卡和黑卡的具体数量。
They had no idea how many red or black cards the deck contained.
答案正确拿出你的绿卡，答案错误拿出你的红卡。
Show your green card for the right answer and your red card for the wrong answer.
首先参与者被告知在这堆卡片中红卡和黑卡的数量，这使得它们可以计算出下一张卡片不同颜色的概率。
At first, the players were told how many red CARDS and black CARDS were in the deck, so that they could calculate the probability of the next card being a certain color.
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