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- The attraction of the moon for the earth causes the tides. 月球对地球的吸引力造成潮汐。
- The tides depend on the pull of the moon. 潮汐是月亮引力作用的结果。
- Scientists are trying to map the surface of the moon. 科学家们正设法绘制月球表面图。
- Certain facts have become known about the materials of the moon. 关于月球的构成物质的某些事实已为人所知。
- The far side of the moon is difficult for us to observe. 我们很难观察月亮的另一边。
- Chemical evolution of the Moon 月球的化学演化
- The silvery globe of the moon sank towards the horizon. 银盘似的月亮朝地平线落去。
- We learned about the complex motion of the moon. 我们弄清楚了月球的复杂运动。
- The earth be 49 times the size of the moon. 地球的大小是月球的四十九倍。
- The light reflected from the surface of the moon. 月光从月亮表面反射出
- He is absorbed in the evolution of the story. 他被故事情节的发展吸引了。
- A view or picture of the surface of the moon. 月球表面的景色或照片
- There will be an eclipse of the moon next month. 下个月有月食。
- On the Pattern of the Evolution of Ea. 论中国早期国家的演进模式。
- Astronauts brought back a piece of the moon. 宇航员取回了一块月岩样本。
- They study the evolution of the universe. 他们研究宇宙的演变。
- The earth is forty nine times the size of the moon. 地球的大小是月球的49倍。
- Lithium is one of the few nuclei which are synthesized during the Big Bang, the abundancesof which are of importance for our understanding of many problems, ranging from primordialnucleosynthesis, to the chemical evolution of our Galaxy. 锂是少数几种在大爆炸中生成的元素之一，研究锂丰度对于探讨各种元素核合成理论以及星系的早期化学演化规律都具有十分重要的意义。
- Thus, this kind of secondary r-process site seems ruled out by the observations. Recently, the abundance evolution of n-capture elements in metal-poor stars play more and more important and active role in chemical evolution of theGalaxy. 由于星系r一过程元素的主要来源为大质量星secondaryr一过程(通过种子核核合成)，核合成区域内种子核和中子源主要来自恒星自身的核反应而不是来自极贫金属星形成时很低的初始丰度，由此可以解释观测到的大量极贫金属星中r过程元素的超丰;
- The earth be49 times the size of the moon. 地球的大小是月球的四十九倍。
