以下为句子列表：
英文: Humans and sea urchins have a common ancestor,Weinstock said.
中文: “人类与海胆有着共同的祖先。”
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英文: Scientists have long used sea urchins to study fertilization and early development in humans.
中文: 科学家们一直用海胆来研究受精卵和人类早期形态。
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英文: Sea urchins can also be used by scientists to detect toxic chemicals.
中文: 海胆还可以用于探测有毒化学成分。
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