Read this excerpt from "Choreographers of Matter, Life, and Intelligence."Clearly, we are on the threshold of yet another revolution. Human knowledge is doubling every ten years.What is the meaning of the underlined term?

A revolution is a major change or transformation. In the excerpt, the phrase “on the threshold of yet another revolution” means that another major change is about to happen, as human knowledge grows rapidly. So the correct choice is change or transformation.

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