Also known as NGC 772, the island universe is over 100 thousand light-years across and sports a single prominent outer spiral arm in this detailed cosmic portrait.

这座宇宙岛的另一个编号是NGC 772，直径超过了10万光年，在下面这幅宇宙图中能清晰看到它只有一条外层螺旋臂。

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Position the conduit in the outer tray in the same spiral orientation toward the center.

以绕向中心的相同的盘旋方向把导管定位在外托盘。

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In this paper, the relations between the parameters of the spiral wound paper tubes and between the diameter of the pulleys and the maximum outer diameter of the paper tubes have been studied.

本文研究了螺旋纸管(罐身)各参数之间，以及皮带轮直径和最大纸管外径之间的关系。

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RadioAstron will also examine pulsars and the outer regions of spiral galaxies in order to get more precise measurements on their rate of rotation and distance from earth.

FORBES: Russian Launch: a Bid for Largest Telescope Ever

They found the youngest stars in the outer reaches of the galaxy's enormous spiral arms, getting progressively older toward the centre.

BBC: Galaxy crash sparks biggest spiral