1.plummet v.（價格等）驟然下跌(to drop sharply and abruptly)

記：plummet愿意為“測深錘”

例：The value of the stock plummeted.

同根詞：plumbing(n．鉛工業(yè))

2.plunge v.驟降（to descend suddenly）；跳進(jìn)(to jump into)

例：The stock's value plunged.

派生詞：plunging(a．突進(jìn)的)

3.plywood n.膠合板(a structural material consisting of sheets of wood glued or cemented together with the grains of adjacent layers arranged at right angles or at a wide angle)

詞根記憶：pIy（重疊）+wood(木)--重疊起來的木板--膠合板

例：Pressboard is an inexpensive new plywood substitute now often used in the construction of houses.

4.pneumonia n．肺炎(serious illness with inflammation of one or both lungs, causing difficulty in breathing)

詞根記憶：pneumon(肺)+ia(病)--肺部的病--肺炎

例：A new study shows that toothbrushes can become contaminated with bacteria that cause pneumonia.

5.pneumonic a．肺的（of, relating to, or affecting the lungs）；肺炎的(of, relating to, or affected with pneumonia)

例：In 1616-1619, pneumonic plague swept coastal New England, killing as many as nine out of ten.

6.poach v.偷獵(to take game or hunt illegally)；水煮(to cook in simmering liquid)

例：Researchers have determined that, because of poaching and increased cultivation in their native habitats, there are fewer than 100 Arabian leopards left in the wild, and that these leopards are thus many times more rare than China's giant pandas.

派生詞：poacher(n．偷獵者)

7.poacher n．偷獵者( one who kills or takes wild animals illegally)

詞根記憶：來自poach(v.偷獵)

例：The Wildlife Protection Committee plans to protect selected rhinoceroses(犀牛)from being killed by poachers.

8.polar a．地極的(of or relating to the South or North Pole)

例：polar regions極地

派生詞：polarize(v.兩極分化)

9.poll n．民意測驗(yàn)(survey of public opinion by putting questions to a representative selection of people)

例：Most of the respondents in a recent poll said they believed that the economy is likely to continue to improve.