pushdown的用法和樣例：
詞匯搭配
- weighted pushdown language 加權疊加語(yǔ)言...
- two-way pushdown automaton 雙向下推自動(dòng)機...
- pushdown stack 下推堆
- primitive pushdown machine 原始下推機
- pushdown storage 下推存儲器
- stochastic pushdown language 隨機下推語(yǔ)言...
- deterministic pushdown automaton 確定性下推自動(dòng)機...
- associative pushdown memory 相聯(lián)存儲器, 相聯(lián)疊...
- stochastic pushdown automata 隨機下推自動(dòng)機...
- pushdown list 下推表
- pushdown dialing 按壓式撥號
- push down 下推
