假设张三和李四生活在一个宿命式的世界里。

Suppose that Mark and Bill live in a deterministic universe.

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从李四光教授对地层古生物、第四纪冰川和地质力学三方面的研究，来介绍他的学术思想和科研成果以及他的地壳运动的理论。

The paper gives an introduction of Li Siguang's academic thought and achievements in three aspects, on stratigraphic paleontology, Quaternary glaciology and geomechanics.

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张三和李四各有各的嗜好，一个爱喝酒，一个喜欢吃点心。

Zhang San was addicted t0 wine and Li Si to snacks.

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