The orbits of planets in the once popular geocentric Ptolemaic system are epitrochoids.曾经盛行的托勒密地心说体系里的行星轨道就是外旋轮线.Mars and Earth have orbits which change with time...火星与地球的运行轨道随着时间而变化。Other enumeration problems lead us to...
But confusions over the two genres have a long history.但是类型的混淆,古已有之.Think of carnival, and you think of crowds, costumes and confusions.想起狂欢节, 你就想起拥挤的人群, 节日的服饰和混乱的场景.Lisacore thinks of nothing but making a market of the ...
The general held a parley with the enemy about exchanging prisoners.将军与敌人谈判交换战俘事宜.He is exchanging intimacies with his friends.他正在和密友们亲切地交谈.We sat exchanging puffs from that wild pipe of his.我们坐在那里,轮番抽着他那支野里野气的烟斗.Steam c...
Waterspouts and hailstorms occur infrequently , while snow and tornadoes are rare.水龙卷和冰雹偶有出现, 降雪和陆龙卷则属罕见.Tornadoes can pick up objects, animals and even people sometimes.龙卷风会卷走物品 、 动物,甚至于人类.And there is concern it could ...