棒旋星系 (SBa-d)：与漩涡星系有著相似的分类，但是旋臂不是由核球伸展出来，而是由穿过核球的棒子末端伸展开来，好像是系在指挥棒末端的缎带。
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Now, if the SBA were to suddenly take over that entire function we'd have to stand up a massive bureaucracy -- a huge one.
WHITEHOUSE: Creating New Jobs by Investing in High-Speed Rail
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