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．胆固醇(a steroid alcohol that is present in animal cells and body fluids)

词根记忆：chole(胆，胆汁)+sterol(固醇)--胆固醇

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

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

词根记忆：和cord(n.索，弦)--起记

例:P is the midpoint of chord AB.

4.chore n.家庭杂务(the regular or daily light work of a household)；令人厌烦的工作(a difficult or disagreeable task)

联想记忆：家庭杂务( chore)总是令人很烦(bore)

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

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

词根记忆：choreo(舞蹈)+graph(写)+er(人)--书写舞蹈的人--舞蹈指导

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

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

词根记忆：chron(时间)+ic--耗时间的--长期的

例:chronic diseases慢性病

派生词：chronically( ad.长期地，慢性地)

同根词：chronometer(n.计时器)：anachronism(n.年代错误)

7.chronicle n.编年史(record of historical events in the order in which they happened)；v.记录，记载(to record)

词根记忆：chron(时间)+icle--按照时间顺序编写--编年史

例:the early chronicles of America//chroniclea development

同根词：chronological(a．按年代顺序排列的)；chronology(n.年代学；年表)

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

词根记忆：chrono(时间)+logy(---门学科)--年代学

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

同根词：chronicle(v.记录;n.编年史)

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

词根记忆：circ(圆，环)+uit--电路是环形的--环道

例:circuit board电路板

派生词：circuitry(n.电路，线路)

10.circular a.圆形的；环绕的(round)

词根记忆：circ(圆，环)+ular--圆形的;环绕的

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