But the deal had come under increasing strain in the past few years, not least over the exact terms of its most important provision, the referendum in the south on whether it wants to secede.

• 但是现在这个和平协议处于危险边缘，并不是因为在重要规定上的苛刻要求，而是在于南方要求脱离苏丹的公民投票。