ion[ˈaɪən]

【词频】★☆☆☆☆

n. 离子

【形】iron[ˈaɪə(r)n] n. 铁；熨斗 v. 熨；烫 adj. 坚定的；严厉的

【例】n. 铁

（2010江苏）The most common occupational name is Smith, which means a person who makes things with iron or other metals.

【译】最常见的与职业相关的名字就是史密斯了，其含义是用铁或其他金属来制作东西的人。

irony[ˈaɪrəni]

【词频】★☆☆☆☆

n. 反语；冷嘲；具有讽刺意味的事

【例】n. 冷嘲

（2007四川）When one of my teachers suggested to his sleepy tenth-grade English class that a person could not have a “complicated idea” until he had read at least two thousand books, I heard the words without recognizing either its irony or its very complicated truth.

【译】我的一位老师向他十年级英语班上昏昏欲睡的学生提出，一个人在读过至少两千本书之前，不会有“复杂的想法”。听到这句话时，我既没有意识到其中的冷嘲意味，也没有意识到这是个十分复杂的事实。

irresistible[ˌɪrɪˈzɪstəbl]

【词频】★☆☆☆☆

adj. 不可抗拒的；吸引人的

irrigate[ˈɪrɪgeɪt]

【词频】★☆☆☆☆

v. 灌溉

【例】v. 灌溉

（2010江西）Suddenly, out of the corner of his eyes, he spotted a small dam used by Mr. Nelson to irrigate his vegetable garden.

【译】突然，他用余光注意到了一个小水坝——内尔森先生用它来灌溉他的菜园。

【派】irrigation [ˌɪrɪˈgeɪʃn] n. 灌溉；冲洗

【例】n. 灌溉

（2010安徽）In Texas, farmers' overuse of irrigation water has resulted in a 25% reduction of the water stores.

【译】在德克萨斯州，农民对灌溉用水的过度使用导致水资源储备量减少了25%。

【形】irritate [ˈɪrɪteɪt] v. 使恼怒；刺激

irritable [ˈɪrɪtəbl] adj. 易怒的

irritation [ˌɪrɪ'teɪʃn] n. 愤怒；生气；令人恼火的事；烦心事

【例】n. 烦心事

（2006全国）If he could replace his great pain with a feeling of love for others, then I should be ______ to give up my small irritations.

A.already

B.likely

C.free

D.able

【译】如果他能用对他人的爱替代内心极大的苦痛，那么我应该______不再想自己无足轻重的烦心事。

A.准备好

B.有可能

C.自由的；免费的

D.能够