Clouds are formed from the evaporation of the oceans' water that is warmed by the Sun and rises high into the atmosphere, condensing in tiny droplets on minute particles of dust.

云是由海洋中的水分被太阳加热蒸发而形成的，这些水分上升到大气中，凝结成微小的水滴，附着于微小的尘埃颗粒。

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The pigeons flew hundreds of miles, averaging speeds of a mile a minute, with messages strapped to their legs in tiny capsules.

鸽子飞行数百英里，平均速度每分钟一英里，信息就放在小胶囊里绑在它们的腿上。

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The tiny muscle beats about 100-150 times per minute-twice the rate which your heart beats.

小肌肉每分种约跳动100——150次——你自心跳频率的两倍。

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Inspired by what I had seen so far, I opted to squeeze in a last-minute jeep tour of the tiny Nairobi National Park that borders the runways of the domestic Wilson Airport.

BBC: The wildest side of Nairobi

The 40-minute journey passes by rocky mountains blanketed with snowy tips and tiny green islands peeking out of the fjords.

BBC: Journey to Canada��s secret sunshine coast

Global's slightly larger version, about the size of a fist, called the iSwipe Mini, secures entranceways and can store 10, 000 iris identities, each compressed into a tiny 2-kilobyte file, and can scan 15 people per minute.

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