... 面联集 surface union 球带调和 surface zonal harmonic 盖射；映成 surjection ...
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... 并集合 union of sets 面并集 surface union 余并集 counion ...
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·2,447,543篇论文数据，部分数据来源于NoteExpress
On the surface it looks like the union has got what it wanted in its dispute with London Underground (LU) and common sense has prevailed.
BBC: Tube strike: Common sense prevails
There has been fresh safe-haven investment demand for gold surface this week, amid fresh tensions between the U.S. and Iran, and amid the ongoing European Union sovereign debt crisis.
FORBES: Comex Gold Trades Near Steady, Supported by Safe-Haven Demand
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