One Two 新知答主 今天不仅是双子座流星雨的极大,也是丹麦天文学家第谷·布拉赫(Tycho Brahe)诞辰476周年,他以准确而全面的天文观测而闻名。1572年11月11日,第谷观察到一颗非常明亮的星星出现在仙后座(图2),但当时的人们认为月球轨道以外的天体永不改变,便把这颗明亮的星星当做是大气层里的东西。第谷对这颗星
A group of frogs were traveling through the woods, and two of them fell into a deep pit(深坑). All the other frogs1the pit. When they saw how 2the pit was, they told the two frogs that they might be3. The two frogs 4what the other frogs were saying and 5to jump up out of ...