In 1872 Thomson led a scientific expedition, which lasted for four years and brought home thousands of samples from the sea.

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问题 In 1872 Thomson led a scientific expedition, which lasted for four years and brought home thousands of samples from the sea.

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答案自1872年始，汤姆逊领导了一次科学考察，这次考察进行了四年，从海洋中采集了成千上万的标本。

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