理学 文本挖掘评测 释 Topic Detection and Tracking; TDT 话题检测与跟踪会议 由美国国防高级研究计划委员会（DARPA）主办的一个关于信息抽取的会议。又名TDT。
TDT 全称：Terrestrial Dynamical Time。地球力学时
数据库 数据库新技术 释文 topic detection and tracking, TDT 主题检测与跟踪 人工智能 计算语言学 释文 tonic detection and tracking, TDT 话题检测与跟踪
- extra-pair mating copulation
- extraplanetary
- extraplanetary space
- extrapolated range
- extrapolation
- extrapolation algorithm
- extrapolation factor
- extrapolation method
- extrapolation method of polarization curve
- extrapolation of coronal magnetic field
- extrapolation technique for antenna measurement
- extrapolation theorem
- extra pulse
- extra push energy
- extrapyramidal symptoms
- extrascholastic sporting activities
- extrasensitivity
- extra-short
- extra-soft
- extrasolar comet
- extrasolar life
- extrasolar planet
- extrasolar planetary system
- Extrasolar Planet Observation and Deep Impact Extended Investigation
- extrasolar radio source