航路航管服务
enroute traffic control service
CCITT I系列推荐书
CCITT recommendations I series
CODATA推荐值
CODATA recommended values
Folksonomy标签推荐系统
tag recommendation system for Folksonomy
Web个性化推荐
Web personalized recommendation
Web页面推荐算法
Web page recommend algorithm
测土配方推荐施肥
Formula fertilization by soil testing
测土推荐施肥
soil testing and fertilizer recommendation