But by firing its three ion engines one at a time over 620 days — accumulating another 60 miles per each day — Dawn has reached its current astronomical speed and has no plans of slowing down.

但是在620天的时间里开动了三个引擎之一——再积累每天60英里——曙光号就已达当前的天文速度，而且没有减速的计划。

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After three years of disastrous rains, the families from the Borana tribe, who by custom travel thousands of miles a year in search of water and pasture, have unanimously decided to settle down.

三年灾难性的大雨之后，这些来自博洛南部落(Borana tribe)，为寻找水草而一年迁徙了几千里的家庭，不约而同地决定在这定居下来。

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Ibrahim Kassim, a representative of Asenca, the regional air security body, said the plane was believed to have come down between three and six miles from the coast.

区域航空安全机构Asenca代表Ibrahim Kassim称，据信该飞机是在距离海岸3到6英里(4.8到9.6公里)处坠海。

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Three miles down the road is Carver High, a rough local school which was plagued by gang violence.

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Pinault chose the Ile Seguin, three miles down the river from Paris and home to a defunct Renault plant.

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In the immense pressure of the sea three miles down, the ROV, known as ISIS, was gently steered around the vents, taking pictures and gathering samples.

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