1.institute v.制定，创立(社团、规章)(to set up; establish);n．学院，协会(an association organized to promote art or science or education)

词根记忆：in+stitut(建立)+e--创立

例：Gandania cannot afford to institute the proposed laws.

派生词：institution(n．制度：建立)

同根词：constitute(v.组成，构建)

2.institution n．(教育、慈善等)社会公共机构(an established organization or foundation, especially one dedicated to education, public service, or culture)；制度，习俗 (a significant practice, relationship, or organization in a society or culture)

例：The financial institutions owe their success to their unique formal organization.

派生词：institutionalize(v.制度化，习俗化)

3.instruct v.指示(to command)；教育，指导(to teach．to direct)

词根记忆：in+struct(建造)--指示人如何建造--指示

例：How many years of education were sufficient to instruct young citizens in civic virtue?

派生词：instruction(n．命令;教导)

4.instrument n.仪器(device)；手段(means)；工具(tool implement)

例：optical instrument光学仪器//financial instrument金融手段

派生词：instrumental(a．起作用的)

5. insulate v.(from, against）使绝缘（尤指热量、电流等） （to prevent the passage of heat, electricity ,or sound into or out of especially by surrounding with a nonconducting material.

词根记忆：insul(岛)+ate--成为岛一样--绝缘

例：How do they manage to insulate against loss off body heat in such a cold condition?

6.insulin n．胰岛索

例：Diabetes(糖尿病)can result from an insulin deficiency.

Activity is the only road to knowledge.

行动是通往知识的唯一道路。

--英国剧作家肖伯纳(George Bernard Shaw, British dramatist)