工学 总论 释 top-down 自上而下 在规划的制定、实施过程中，规划及相关政策的执行者（政府）是主要的参与者，并集中关注在宏观层面决策和贯彻落实衔接的方式。
软件工程 释文 top-down 自顶向下
- natural color
- natural color cocoon
- natural color silk
- Natural Color System
- natural color system
- natural communication network
- natural complex
- natural computing
- natural connection
- natural conservation law
- natural constraint
- natural control
- natural convection
- natural convection heat transfer
- natural convection in enclosure
- natural convection in infinite space
- natural convolutions in cotton fiber
- natural cooling of motor
- natural cooling source
- natural coordinate
- natural coordinate frame
- natural coordinates
- natural coordinates system
- natural correspondence
- natural crime