经验是思想之子，思想是行动之子，了解他人不可以书本为据。
Experience is the child of thought, and thought is the child of action. We cannot learn men from books.
虽然这两例相互关联和生活在同一街区，但是据认为不可能发生人际传播。
Although the two cases are related and lived in the same neighbourhood, human-to-human transmission is considered unlikely.
据推测不可见的暗物质占到宇宙总质量的25%，其存在的间接证据主要是由于观察到其施加在星系和恒星上的引力作用。
Much indirect evidence for dark matter — supposedly 25 percent of the mass in the universe — comes from observing its invisible gravitational effect on visible galaxies and their stars.
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