Question

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Explanation:

根据科学研究中模型的定义和作用，第一个空需要填入表示“模型”的词汇，用来指代这类科学工具；第二个空是模型的功能，即“呈现”相关科学事件；第三个空说明模型是一种有用的“工具”。

Answer:

A model is used to represent events in science that take place too fast or too slow, are too large or too small to be seen, or that may be too difficult to explore. They are a useful tool to simplify or explain complex concepts.