- 天文学外层空间事物的科学研究，尤指天体及天文现象的位置、大小、分布、运动、构成、能量及演化的科学
The scientific study of matter in outer space, especially the positions, dimensions, distribution, motion, composition, energy, and evolution of celestial bodies and phenomena.
- 爱丁顿，阿瑟·斯坦利1882－1944英国数学家、天文学家和物理学家，相对论的早期拥护者，在星体演化、结构和运动方面有很深研究
British mathematician, astronomer, and physicist who was an early exponent of the theory of relativity and conducted research on the evolution, structure, and motion of stars.
- 在演化过程中一些鸟失去了飞行的能力。
In the course of evolution, some birds have lose the power of flight.
- 物种原形演化成后来各物种的真实存在的或假设的有机物
The actual or hypothetical organism or stock from which later kinds evolved.
