1. To explain this, they hypothesize that galaxies must contain a great deal of missing matter which cannot be detected. 为了解释这一点，他们假定银河系一定包含了大量无法探测到的不明物质。
2. They hypothesize that language diversity must be about history, cultural differences, mountains or oceans dividing populations. 他们假设，语言多样性一定与历史、文化差异、山脉或海洋分隔人口有关。
3. Some scientists hypothesize that the extinction of the dinosaurs resulted from the effects of an asteroid collision with Earth. 一些科学家假定，小行星撞击地球导致了恐龙的灭绝。
4. It's only logical to hypothesize that a lot of these people migrated to the Nile valley when they realized that this was more than a temporary drought. 当人们意识到这不仅仅是一场暂时的干旱时，他们中的许多人迁移到了尼罗河谷，这是唯一合乎逻辑的假设。
5. And some people take this a step further, and they hypothesize that this migration actually provided an important impetus in the development of ancient Egypt. 有些人对这方面做了进一步的研究，并假设这次的迁移实际上为古埃及的发展提供了一个重要的动力。
