Dark matter
例子
Dark matter is a form of matter that does not emit, absorb, or reflect light, making it invisible and detectable only through its gravitational effects.
暗物质是一种不发射、不吸收也不反射光的物质形式,使其不可见,只能通过其引力效应被探测到。
Astronomers believe that dark matter makes up approximately 27 % of the universe's total mass and energy content.
天文学家认为暗物质约占宇宙总质量和能量的27%。



























