免资明信片 Postage Free Postcard

免疫信息学 Immunoinformatics

免税信贷 [税收] tax sparing credit

赦免信 Pardon Letter

免疫信号转导研究 Study on immune signaling

免疫信息系统 Immunization Information Systems

免疫信号的调整和放大 Signal modulation and amplification

费用减免申请信 Concession Request Letter

免费短信软件 WhatsApp Messenger

灾后债务减免信托基金 Post-Catastrophe Debt Relief Trust Fund