How does nature form a danger to people in the world and how can science help reduce that threat.

大自然是怎样对全世界人民形成一种威胁的及科学能如何帮助减少这种威胁。

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The Roon Sea covers much of the planet, and frequent storms cause huge whirlpools to suddenly form, posing a danger to ocean-going vessels.

鲁恩星球表面大部分被海洋所覆盖，常年的狂风暴雨令巨大的漩涡能在瞬间形成，给远洋航行的船只造成威胁。

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City were themselves hitting better form, having moved away from relegation danger thanks to a five-match unbeaten run.

BBC: SPORT | Football | Premiership | Arsenal 3-1 Man City