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例：geometric progression幾何級數，籌比級數
2.progressive a．上進的(advancing)；【醫】愈來愈嚴重的(increasing in severity)
詞根記憶：來自progress(n．進步)例：The ideal of "openness" has made Americans a progressive people.// The value of a treatment for a progressive disease may vary according to a patient's stage of disease.
派生詞：progressively( ad.逐漸地，逐步地)
3.prohibit v．禁止（to forbid by authority）；阻止(to prevent from doing sth.)
詞根記憶：pro(提前)+hibit(拿住)--提前拿住--禁止；阻止例：Fishing regulations prohibit people from keeping any salmon they have caught in Lake Paqua.
派生詞：prohibition(n．禁止；禁令)
同根詞：inhibit(v.禁止)
4.project n．工程：計劃(scheme)；v.預計( to plan, figure, or estimate for the future)
詞根記憶：pro(提前)+ject(扔)--提前扔出來--預計例：Aviation fuel is projected to decline in price over the next several years.
5.projection n．預測；規劃(scheme)
詞根記憶：pro(提前)+ject(扔)+ion--提前扔出來--規劃：預測例：Weather forecasters make some use of computer projections to identify weather patterns.
6.prokaryote n.原核生物(any of the typically unicellular microorganisms that lack a distinct nucleus and membrane bound organelles)
派生詞：prokaryotic(a.原核的)
