(1)irrespective

a. (of)　不考虑的，不顾及的

Eg. Irrespective of the weather, I think we should still go sailing.

（2）irrigation

n.　灌溉

Eg. That is because they have developed an extensive and efficient irrigation system.

(3)irritate

vt.　１．使恼怒，使烦躁；２．使（身体某部分）不适，使疼痛

Eg. My little sister always irritates me.

(4)isle

n.　小岛，岛

Eg. The isle where we camped was just one hour by boat off shore.

(5)ivory

n.　１．象牙；２．象牙色，乳白色

Eg. That’s because it is made out of ivory.

(6)jargon

n. 术语，行话

Eg. No, there was too much jargon and terms that I had not seen before.

(7)jeopardise

vt. 危机，损害

Eg. Good, there is no point in jeopardising your degree.

(8)jerk

vt. 使猝然一动，猛拉

vi. 猝然一动

n. 急推，急拉，急扭

Eg. Good thing that he jerked just in time to miss it.

(9)jockey

n. 1。骑师；2。[美俚]驾驶员，（机器等的）操作手

vi. (for) 谋取

vt. 劝说，诱使

Eg.You’re so small you would make an excellent jockey .

(10)jolly

a. 快乐的，高兴的，愉快的

ad. 很，非常

vt. 劝服，哄

Eg. Mr. Smith has a jolly sense of humour