A: How can your camera take picture in the dark?
B: It has an infrared light to help it focus.
infrareda.紅外線的
A: The roads and railways in my country are terrible.
B: Yes, the government needs to develop the infrastructure.
infrastructuren.基礎結構，基礎設施
A: I think I will take the day off work>
B: What an ingenious idea!
ingeniousa. 1.（物件等）設計獨特的，（方法等）別緻的'，巧妙的；2. （人，頭腦）靈巧的，關於創造發明的
A: Di VInchi was a painter and designer of great ingenuity.
B: Yes, he was certainly very talented.
ingenuityn.獨創性，巧妙
A: I would love to inhabit a small tropical island.
B: Alone? Would you not get lonely?
inhabitvt.居住於，（動物）棲居於
A: Please inhale the sweet fragrance from the flowers.
B: Sorry, my nose is blocked.
inhalev.吸入（氣體等），吸（煙）
A: There are certain facts inherent in the situation that I am unable to understand.
B: Perhaps you need to spend some more time thinking about it then.
inherenta. (in)內在的，固有的，生來就有的
A: I was inhibited form entering the building.
B: Why were there barriers in your way?
inhibitvt.阻止，妨礙，抑制
A: I’d like to initiate a new project.
B: Sounds exciting, what are your plans?
initiatevt. 1.開始，創始，發起；2. 使初步瞭解；3. 接納（新成員），讓……加入
n.新加入組織的人
A: I had to have the medicine injected directly into my veins.
B: Ouch! That sounds painful!
injectvt. 1.注射（藥液等），給……注射；2. 注入，引入，投入
A: Do you live by the coast?
B: No, I live inland, about five hours from the sea.
inlanda.內地的，內陸的
ad.在內地（或內陸），向內地（或內陸）
A: let’s go for a picnic.
B: Good idea, I know a small inlet where we spend the afternoon.
inletn. 1.水灣，小灣；2. 進口，入口
A: The prison inmates were protesting because of their living conditions.
B: Yes, the prisoners have a hard time.
inmaten.（獄中的）囚徒，（精神病院等中的）被收容者
A: You are such a good pianist, it must be innate.
B: No, the prisoners have a hard time.
innaten.天生的，固有的，天賦的
A: I’m going to an exhibition of modern innovations this afternoon.
B: Oh, can I come? I’m fascinated by new inventions.
innovationn. 1.新方法，新事物；2. 革新，創新
A: There are innumerable reasons why I can’t marry you.
B: Surely there can not be that many .
innumerablea.無數的，數不清的