Hexaoxadiazabicyclohexacosane
[化] 六氧二氮雙環十八烷
??? 情景例句
People don't ask unmarried people Why are you single?.
人們不會問未婚的人“你為什么不結婚？”。
How did you recognize him?
你是如何認識他的？
and then there are three thousand million other Milky Ways, or galaxies, in the universe.
況且在宇宙中還有30億個天河，即銀河系。