1.nonbiodegradable a．不能生物降解的

词根记忆：non(不)+bio(生物)+degradable(可降解)--不能生物降解的

例：Plastic containers account for the primary part of nonbiodegradable waste.

2.noncommercial a．非商业的(not occupied with or engaged in commerce or work intended for commerce)

词根记忆：non(不)+commercial(商业的)--非商业的

例：The average noncommercial-vehicle driver is involved in less long- distance driving than is the average commercial-vehicle driver.

3.noncommittal a.不负责的(not revealing what one feels or thinks)；不明朗的(giving no clear indication of attitude or feeling)

词根记忆：non(不)+commit(负责)+tal--不负责的

例：The noncommittal candidate refused to debate the issues.

4.nonessential a．不重要的(unimportant)；非必需的(not essential)

词根记忆：non(不)+essential(重要的，必要的)--不重要的；非必需的

例：Only expenditures for nonessential services were actually reduced.

5.nonstarter n.毫无成功希望的人（someone that is not productive or effective）

例：Those nonstarters were considered the ones who wanted stability.

6.note n．记录(record)；音符(melody)；v.注意(to notice)；指出(to indicate)

例：My boss noted my reluctance to work On Saturdays.//This musical scale has 13 notes.//This report noted that the closer One Came to town, the more the city air would become increasingly acidic.

派生词：noted（a．著名的）

7.notify v.通知，报告(to inform)

词根记忆：not（标识）+耐（使…）--使…知道--通知，报告

例：Each country was to notify the six other countries when it had completed its action．

派生词：notification（n.通知，告示）

8.notorious a.声名狼藉的(widely and unfavorably known)

词根记忆：not(知道)+orious(多的)--人所共知的--声名狼藉的

例：Napoleon was notorious for refusing to share power with any of his political associates.

9.novel n.（长篇）小说( an invented prose narrative that is usually long and complex and deals especially with human experience through a usually connected sequence of events);a．新颖的(new)；期译寄的( original new)

词根记忆：nov(新)+el--新颖的

例：novel behavior 怪异的行为//The early buyers of a novel product are always people who are quick to acquire novelties.

派生词：novelty(n．新奇性)

同根词：innovate(v.革新)