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。
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。
The racks (30) can be extended in length in each case via a pivotable lever (11), in order to ensure that the drawer (1) is also guided by the gearwheels (10) in the pulled-out position.
各齿条(30)可分别经由一可偏转的杆(11)加长，借此在拉出位置也确保抽屉(1)通过各齿轮(10)的导向。
The racks (30) can be extended in length in each case via a pivotable lever (11), in order to ensure that the drawer (1) is also guided by the gearwheels (10) in the pulled-out position.
各齿条(30)可分别经由一可偏转的杆(11)加长，借此在拉出位置也确保抽屉(1)通过各齿轮(10)的导向。
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