oil[??l]

【词频】★★★★☆

n. 油；石油

v. 给某物上油

【派】oily [???li] adj. 油的；油质的；谄媚的

silver[?s?lv?(r)]

【词频】★★★★☆

n. 银；银色；银币；银器

adj. 银色的

tax[t?ks]

【词频】★★★★☆

n. 税

v. 征税；耗尽(力气、耐心、资源等)

【形】taxpayer [?t?kspe??(r)] n. 纳税人

trick[tr?k]

【词频】★★★★☆

n. 把戏；诡计；技巧；诀窍；花招

v. 哄骗；欺骗

【例】n. 花招

（2008江西）A clever trick suggested by unicorn-trappers, in order to catch this magnificent beast without being hurt by its horn, was for the hunter to stand in front of a tree and then to move quickly behind it as the unicorn charged.

【译】为了抓住这个壮硕的猛兽而又不被它的角伤到，捕兽者想出了一个聪明的花招，猎人先站在树前，当独角兽冲过来的时候迅速躲到树后面去。

【派】tricky [?tr?ki] adj. 狡猾的；奸诈的；难对付的；棘手的

【例】adj. 难对付的

（2013北京）They then evaluated the participants' multitasking ability with a tricky mental task that required the students to do simple mathematical calculations while remembering a set of letters.

【译】然后他们评估了这些学生一心多用的能力，用的是一种很难的智力测试：要求学生进行简单数学运算的同时记忆一组字母。