A not so random sample would probably work just as well, such as that done by the Barnum and Bailey circus to their flock of elephants.
不是随机找的大象也行，因为Barnum和Bailey马戏团用他们的一群大象也做过类似实验。
A not so random sample would probably work just as well, such as that done by the Barnum and Bailey circus to their flock of elephants.
不是随机找的大象也行，因为Barnum和Bailey马戏团用他们的一群大象也做过类似实验。
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