阻挠联合国化学武器专家进入核实攻击五天之久足以让巴沙尔政府隐瞒犯罪证据、让证据降解或用后续炮轰毁灭证据。
The five-day delay in allowing UN chemical-weapons experts to verify the attack gave Assad’s government ample time to conceal incriminating evidence, allow it to degrade, or destroy it with further shelling.