Very accurate predictions of planetary orbits require corrections to the central-field approximation.

想要非常准确地预言行星的轨道，就需要对中心场近似进行修正。

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Every field has some central tension it is trying to resolve.

每个领域都有一些它试图解决的中心问题。

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Patients may report flashes of light, floaters, a curtain or shadow moving over the field of vision, and peripheral or central visual loss.

患者可能会看到闪光，漂浮物，帷幕或阴影遮挡住了视野，以及周边或中心视力丧失。

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The solar steam is being injected into wells to make it easier to extract heavy crude from a 120-year-old oil field in the Central Valley town of Coalinga.

FORBES: Chevron Taps The Sun To Extract Crude From California

The soldier was taken to a field hospital, but the wounds were not considered life-threatening, according to Central Command.

CNN: Two killed in second clash in Fallujah

The acquisition is made up of BP's interests in both mature and newly developed projects including Harding (70%), Maclure (37.03%) and Devenick (88.7%) fields in the central North Sea, as well as BP's non-operated interests in the Brae fields complex and the Braemar field.

BBC: BP to raise $1.1bn from North Sea field sale