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- Geologists have calculated the age of the earth. 地质学家已经计算出了地球的年龄。
- The professor theorized about the age of the earth. 教授从理论上推测了地球的年龄。
- Nobody knows the age of the earth for certain. 没有人确切知道地球的年龄。
- The age of the earth is reckoned at about 4600 million years. 估计地球的年龄大约为46亿年。
- Knowledge about the age of the earth and the sun was very hazy. 人们对地球和太阳年龄的认识相当模糊。
- Our pilotless rocket enters the track of the earth. 我们把一个无人驾驶的火箭送入了地球的轨道里。
- The average age of the boys in this class is fifteen. 本班男生的平均年龄是十五岁。
- 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 average age of the students is 19. 学生的平均年龄是19岁。
- What percentage of the earth is covered by oceans? 地球上百分之多少被海水覆盖着？
- If this line represents the age of the earth, then the dinosaurs died out here. 如果这条线代表地球的年龄，那么恐龙就是在这里灭亡的。
- The heated air drinks up the moisture of the earth. 热空气把土里的湿气都吸干了。
- What is it like in the bowels of the earth? 地球内部是什么样子？
- Nitrogen forms most of the Earth's air. 地球上空气的大部分成分是氮气。
- The bird-song is the echo of the morning light back from the earth. 鸟的歌声是曙光从大地反响过去的回声。
- By this means the age of the earth had been estimated at several hundred million years. 用这个办法推算出地球的年龄是数亿年。
- The boy asked what lay in the bosom of the earth. 那男孩问地球内部是什么。
- The first blades of grass speared out of the earth. 第一批青草的叶片破土而出。
- Shapley，Harlow，1918,The Age of the Earth Publication ofAstronomical Society of the Pacific ,No.177. 石井八万次郎，扬子江流域，160-161页，又第23版，浙江省钱塘江流域图，及东京地学协会出版杭州地图。
- The age of the robotic rodent is upon us. 啮齿类机器人的时代正在向我们走来。
