This famous scientist will make a speech in our school next week.

这个著名的科学家下个星期将在我们学校做一次演讲。

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At the beginning of the show, a famous scientist made a speech.

在展览开始的时候，一个著名的科学家作了讲话。

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A famous scientist then made a speech.

然后一位著名的科学家发表了演讲。

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A famous scientist then made a speech.

然后一位著名的科学家发表了演讲。

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