International Force (less common)国际力量(较少) Implementation Force执行力 Inertial Frame of Reference惯性系 International Peacekeeping Force国际维和部队 Interagency Forum for Operational Requirements跨部门的论坛,让操作要求 International Fellowship of Reconciliation国际联谊和解 Intelligent Forces智能力量 Immigrants Force移民力 The International Fellowship of Reconciliation在国际联谊和解