Peter Dodds of the University of Vermont draws a particular analogy between the blood system and a suburban railway network.

佛蒙特大学的彼得·多兹将血液循环系统和城郊铁路网做了一个很特别的类比。

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In a statement, DUP leader Peter Robinson said Mr Dodds hoped to be discharged on Thursday.

BBC: DUP MP Nigel Dodds in hospital after taking ill

But the DUP's executive ministers Peter Robinson and Nigel Dodds stayed away, instead meeting two Protestant victims' groups in south Armagh.

BBC: Paisley: Embryo all-Ireland government

DUP's two ministers, Peter Robinson and Nigel Dodds, say they will have no dealings inside the executive with the Sinn Fein pair.

ECONOMIST: Enemies and colleagues