Astronomers used to detect them by indirect methods, such as picking up a small wobble in the position of the star that indicated it was being pulled very slightly towards an orbiting planet.

天文学家过去常用间接方法探测这类物体，如在恒星周围某一点，探测到一丝“抖动”，这表明围绕恒星运转的行星正将其轻轻拉走。

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When its rivals pulled back from Asia during the region’s financial crisis in 1997, Cisco deliberately increased its presence there, gaining a leading position it has never relinquished.

1997年当公司的竞争对手们由于亚洲地区性金融危机撤出亚洲市场时，Cisco却增加产品投放量，获得了它从未放弃的领先地位。

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Thee foredeck in position and ready to be pulled down onto the deck beams.

的前甲板的位置和准备推倒到甲板梁。

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"Doris was obviously in good shape given her position at the World Cross Country and it showed when she just pulled away from me on the steepest part of the course, " said Pavey.

BBC: Great Ireland double for Kenyans

With recent restrictions imposed on their activities by Eritrea the UN forces are being left in an increasingly untenable position and with little prospect of border demarcation, the chances of the force being pulled out must be growing.

BBC: NEWS | Africa | Q&A: Horn's bitter border war