tenure
n. 任期
eg. She felt the insecurity of her tenure of her brother's hospitality.
她感到，她在她弟弟府上的居留權已朝不保夕。

curriculum
n. 課程
eg. We shall have to design a new curriculum for the third year.
我們得設計出三年級的新課程。

be dedicated to
致力于，獻身于
eg. The monument be dedicated to the memory of the national hero.
這座碑是為紀念那位民族英雄而建造的。

prevalence
n. 普遍，流行
eg. The prevalence of cigarette smoking was much higher in lower social groups.
吸煙在低層社會群體中更為盛行。

scarity
n. 不足；缺乏
eg. Firewood scarity offers the most visible and dramatic example of deforestation's effects.
薪材短缺是毀林后果的最明顯和最引人注目的實例。

rhetorical
adj. 修辭的
eg. The Grand Design reached its rhetorical apogee.
宏偉計劃達到口頭上的高潮。