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- Methane is highly flammable on Earth, but It is not on Titan because it is freezing cold there. 在地球上，甲烷具有高度可燃性。由于土卫六非常冷，那里的甲烷失去了可燃性。
- If an ancient alien civilization built a city on Mars, Hoagland reasoned, why not on the moon and on Earth itself! 如果一种古代外国人文化在火星上建造一座城市，霍格兰讲道理，为什么不在月亮上和在地球上它自己！
- There is not on earth a more merciless exactor of love from others than a thoroughly selfish woman. 一个自私透顶的女人，在榨取爱情时比谁都厉害。
- How on earth do they manage to rob the bank? 他们到底怎么抢了银行的？
- Did Jack thank me for my advice? Not on your life. 杰克有没有谢谢我的劝告？一点也没有。
- Who on earth is that female he's with? 跟他在一起的那个女人究竟是谁?
- Antarctica is the loneliest place on earth. 南极是地球上最偏远的地区。
- They're not on speaking terms after their quarrel. 他们那次吵过架後就互不理睬了。
- The examples are not on all fours. 这些例子并不完全一致。
- No power on earth could force me to do it. 谁也不能强迫我做这事。
- Judgment should be based on facts, not on hearsay. 判断应该以事实为依据，而不应该依靠道听途说。
- How on earth did you manage that? 你到底是怎么做的？
- I must be the happiest woman on earth! 我一定是世界上最幸福的女人了。
- Nobody is able to know whether one thing is right or not on earth before a new idea or means has been produced to oppose it. 在一个新的观念或方法产生来反对它之前,没有人能知道一件事究竟是对还是错。
- The families of the two young souls were not on borrowing terms. 这两个年轻人的家庭之间的关系不很友好。
- The place becomes a hell on earth. 那儿成了人间地狱。
- Not on friendly terms; disagreeing. 无礼的不友好的; 持不同意见的
- Why on earth didn't you tell me the truth? 你到底为什么不跟我说实话？
- Where on earth have we fetched up now? 我们现在究竟到哪里了?
- I see him on the train every day but we're not on speaking terms. 我每天都在火车上见到他，但彼此没说过话。
