irrevocable

不可撤销的，无法改变的

【例】 He said the decision was irrevocable.

他说这项决定是不可改变的。

irritate

刺激，使兴奋；激怒

【例】 It was justifiable for him to claim unemployment benefit, but the way he spoke really irritated me.

他有正当理由索要失业救济，但是他说话的方式实在令我恼火。

isolate

（使）隔离；（使）孤立；隔离的

【例】 It is impossible for one country to completely isolate itself from others in this globalised world.

在这个全球化的世界，一个国家不可能和其他国家完全隔绝开来。

issue

发行，发布；（书刊的）期；问题，争议；颁布

【例】 The government has just issued a new decree to purify the market environment and maintain the fair competition system.

政府刚刚颁布一项新法令来净化市场环境，维护公平的竞争秩序。

IT (=Information Technology)

信息技术

【例】 Information technology is changing not only our life but also our way of thinking.

信息技术不仅改变着我们的生活，也改变着我们的思维方式。