"We don't know how much dark matter is outside of what we're measuring," says galaxy modeller Christopher Mihos of Case Western Reserve University in Cleveland, Ohio.
我们不知道有多少暗物质在我们的测量之外“，俄亥俄州克里夫兰市的Case Western Reserve大学的星系建模专家Christopher Mihos说。”
2
“What we're attempting to do is measure collective happiness on a much larger scale, similar to measuring the temperature outside,” Professor Danforth said。
丹福思教授说：“我们想评定更大范围人群的集体快乐指数，就像测量室外温度一样。”
3
In the past 13 years, scientists have discovered more than 300 planets outside our solar system, but they have done so indirectly, by measuring changes in gravity, speed or light around stars.