1.hypodermic：a. 皮下注射的
There is a risk of transmission of the virus between hypodermic users.（接受皮下注射者有相互传染病毒的可能。）
2.hypotenuse：n. 弦，斜边
3.hypothesis：n. 假设，假定
The theory is based on the hypothesis that all men are born equal.（这个理论基于人人平等的前提。）
4.insurmountable：a. 无法超越的，不能克服的
There is no insurmountable difficulty before a brave man;it is in difficult circumstances that a hero distinguishes himself.（好汉面前无困难,困难当中出英雄。）
5.insurrection：n. 起义，暴动
6.intake：n. 1.吸入（量），纳入2. （液体等的）进入口
7.integer：n. 整数，完整体
8.interjection：n. 感叹词
9.interlocutor：n. 参加对话（讨论）的人
10.intermediary：n. 调解人，中间人
They disliked each other too much to meet, so they conducted all their business through an intermediary.（他们彼此交恶不愿相见, 有事均通过中间人处理。）