No solution can be imposed, given disagreements among the outside countries with a stake in Syria and the strength of both IS and the Syrian government. What diplomacy may be able to do is reduce, if not end, the fighting between the Syrian government and its own people, as the UN is attempting to do in Aleppo.
此时，外交无法起到很大作用。没有方案可以实行，因为在叙利亚有利益纠缠的外部国家之间分歧太多而伊斯兰国和叙利亚政府也太强大。外交也许能够完成的是减少乃至结束叙利亚政府与本国人民之间的斗争，比如联合国正在阿勒颇所做的尝试。