1.chip n．芯片(microchip)；碎片(thin piece)

例:Computer memory chips have become thinner and the chips' circuits more complex.

2.cholesterol n．膽固醇(a steroid alcohol that is present in animal cells and body fluids)

詞根記憶：chole(膽，膽汁)+sterol(固醇)--膽固醇

例:Garnet pays for both testing of its employees' cholesterol levels and treatment of high cholesterol.

3.chord n.【幾何】弦(straight line that joins two points on the circumference of a circle or the ends of an arc)

詞根記憶：和cord(n.索，弦)--起記

例:P is the midpoint of chord AB.

4.chore n.家庭雜務(the regular or daily light work of a household)；令人厭煩的工作(a difficult or disagreeable task)

聯想記憶：家庭雜務( chore)總是令人很煩(bore)

例:Women were by nature patient in carrying out repetitive chores.

5.choreographer n.舞蹈指導(director, for ballet and dancing on the stage)

詞根記憶：choreo(舞蹈)+graph(寫)+er(人)--書寫舞蹈的人--舞蹈指導

例:Her innovative masterworks made her the most honored of American choreographers.

6.chronic(all) a.長期的，慢性的(marked by long duration or frequent recurrence)

詞根記憶：chron(時間)+ic--耗時間的--長期的

例:chronic diseases慢性病

派生詞：chronically( ad.長期地，慢性地)

同根詞：chronometer(n.計時器)：anachronism(n.年代錯誤)

7.chronicle n.編年史(record of historical events in the order in which they happened)；v.記錄，記載(to record)

詞根記憶：chron(時間)+icle--按照時間順序編寫--編年史

例:the early chronicles of America//chroniclea development

同根詞：chronological(a．按年代順序排列的)；chronology(n.年代學；年表)

8.chronology n.年表：年代學(the science that deals with measuring time by regular divisions and that assigns to events their proper dates)

詞根記憶：chrono(時間)+logy(---門學科)--年代學

例:A chronology of the development of different methods for mapping Native American lands describes the content of the passage.

同根詞：chronicle(v.記錄;n.編年史)

9.circuit n.電路(complete path along which an electric current flows)；環道(a usually circular line encompassing an area)

詞根記憶：circ(圓，環)+uit--電路是環形的--環道

例:circuit board電路板

派生詞：circuitry(n.電路，線路)

10.circular a.圓形的；環繞的(round)

詞根記憶：circ(圓，環)+ular--圓形的;環繞的

例:An artist wishes to paint a circular region on a square poster.