foil
/fɔɪl; fɔɪl/ n
1 [U] metal rolled or hammered into a very thin flexible sheet 箔
tin, aluminium foil, ie such as is wrapped round bars of chocolate 锡纸、 铝箔（如包装巧克力的）.
2 [C] person or thing that contrasts with, and so emphasizes, the qualities of another 陪衬; 衬托
Her sparkling jewellery served as the perfect foil for her fine complexion. 她戴著闪闪生辉的首饰, 更显得容貌姣好.
foil / fɔɪl; fɔɪl/ v [Tn]
prevent (sb) from carrying out a plan; prevent (a plan, etc) from succeeding; thwart; frustrate 阻止（某人）执行计画; 阻挠（计画等）; 挫败
He was foiled in his attempt to deceive us/His attempt to deceive us was foiled. 他企图欺骗我们, 但没有得逞.
foil / fɔɪl; fɔɪl/ n long thin light sword with a protective button on the point, used in fencing (fence2) （击剑运动的）钝头剑. =>illus at fencing (fence) 见fencing插图. Cf 参看 epee, sabre.