| LTR | Limiter | 限制器 |
| LTR | Long terminal repeat | 长末端重复序列 |
| LTR | Library Technology Reports (American Library Association publication) | 图书馆技术报告(美国图书馆协会出版物) |
| LTR | Letter | 信 |
| LTR | Left to Right | 从左到右 |
| LTR | Loop Transfer Recovery | 回路传输回收 |
| LTR | Lifetime Risk | 终身风险 |
| LTR | Long-Term Return Rate (TL 9000) | 长期回报率(TL 9000) |
| LTR | Land Tenure Regularisation | 土地使用权规范化 |
| LTR | Lepidoptera of Turkey (Centre for Entomological Studies Ankara project) | 土耳其鳞翅目昆虫(安卡拉昆虫研究中心项目) |
| LTR | Logic Trunked Radio (trunked two-way radio) | 逻辑集群无线电(集群双向无线电) |
| LTR | Licensing Topical Reports | 许可主题报告 |
| LTR | Laser Transmitter Receiver (LANTIRN) | 激光发射器-接收器(LANTIRN) |
| LTR | Laser Target Rangefinder | 激光目标测距仪 |
| LTR | Lossless Trace Reduction | 无损跟踪减少 |
| LTR | Lead Technical Representative | 首席技术代表 |
| LTR | Load Task Register | 加载任务寄存器 |
| LTR | Learn To Return | 学会回报 |
| LTR | Lower Troposphere Radar | 低对流层雷达 |
| LTR | Latent Tank Resonator | 隐槽谐振器 |
| LTR | laryngotracheal reconstruction | 喉气管重建 |
| LTR | lymphocyte transformation rate | 淋巴细胞转化率 |
| LTR | Long Terminal Repeats | 长终端重复 |
| LTR | lymphocyte transfer reaction | 淋巴细胞转移反应 |
| LTR | Long Term Relation | 长期关系 |
| LTR | Light Tactical Rifle | 轻型战术步枪 |
| LTR | Love, Trust, Respect | 爱、信任、尊重 |
| LTR | Life Time Relationship | 生命周期关系 |
| LTR | Logical Trunked Radio | 逻辑中继无线电 |
| LTR | Logistics Training Review | 后勤培训审查 |
| LTR | Level Term Rider (life insurance) | 水平定期附加险(人寿保险) |
| LTR | Light Tactical Raft | 轻型战术木筏 |
| LTR | Long Term Requirement | 长期要求 |
| LTR | Loving Tender Relationship | 爱的温柔关系 |
| LTR | Little Theatre of the Rockies | 落基山脉小剧院 |
| LTR | Leisure Tyme Rentals, Inc. (Albemarle, NC) | Leisure Tyme Rentals,Inc.(北卡罗来纳州阿尔伯马尔) |
| LTR | Long Term Research | 长期研究 |
| LTR | Love Trust Respect | 爱信任尊重 |
| LTR | Licensing Topical Report | 许可主题报告 |
| LTR | Long Term Romance | 长期浪漫 |
| LTR | Loss of Therapeutic Response (drug efficacy) | 治疗反应丧失(药物疗效) |
| LTR | Local Travel Report (AMSEC) | 当地旅行报告(AMSEC) |
| LTR | Lower Trunk Rotation (physical therapy) | 下躯干旋转(物理治疗) |
| LTR | Learn to Row (rowing instruction) | 学会划船(划船指导) |
| LTR | Light Transmission Ratio | 光透射比 |
| LTR | Lady To Ride | 要骑的女士 |
| LTR | Long Term Relationship | 长期关系 |
| LTR | Loan against Trust Receipts | 信托收据贷款 |
| LTR | Long-Term Recall (neuropsychology) | 长期回忆(神经心理学) |