n.　轨道
v.　（绕．．．）作轨道运行
A: I thought the music for the play was excellent.
B: So did I. The live orchestra added so much to the atmosphere..
orchestra
n.　管旋乐队
A: You have such an orderly office.
B: I try to keep it this way, because I have trouble working in a messy office.
orderly
a.　整齐的，有秩序的
A: What was it that jump-started the economy here?
B: Several years ago they discovered a huge underground supply of iron ore.
ore
n.　矿，矿石
A: How did your friend die?
B: All if his major organs failed at once.
organ
n.　１．器官；２．风琴；３．机构；４．新闻媒介，宣传工具
A: Why do you only buy organic vegetables?
B: Because I’m afraid of the pesticides on non-organic vegetables.
organic
a.　有机（体）的，有机物的
A: Congratulations on being made the new head of the organization!
B: Thank you.
organization
n.　１．团体，机构；２．组织
A: I need someone to help me organize this meeting.
B: I’d love to help you, but I really don’t have the time.
organize
vt.　１．组织，把．．．编组；２．使有条理
A: I’m really curious to find out the origins of my ancestors.
B: There are websites that might be able to help you in your research.
origin
n.　１．起源，来源，起因；２．［常pl.］出身，血统
A: What does your organization do?
B: Our original purpose was to help homeless women, but now we’ve expanded to helping all homeless people.
original
a.　１．起初的，原来的；２．独创的，新颖的；３．原版的，原件的
n.　原件，原作
A: How much is an ounce of gold worth?
B: I’m not entirely sure, but I know that it’s worth a lot.
ounce
n.　盎司
A: Regardless of the outcome of the game, I hope that you kids play hard.
B: We will, Coach.
outcome
n.　结果
A: Where does your family live?
B: We live in an outer suburb of Chicago.
outer
a.　１．外面的，外表的；２．远离中心的，外层的
A: Why do you play golf every Saturday?
B: I use it as an outlet for all of the frustration that builds up during the week.
outlet
n.　１．出口，出路；２．（感情，精力等）发泄途径
A: Have you finished your paper?
B: Not yet, but my outline is done.
outline
n. 1．提纲，要点，概要；２．外形，轮廓，略图
vt.　１．概述，概括；２．描．．．外形，描．．．轮廓
A: How do you manage to have such a positive outlook on life?
B: I just try to live in the moment.
outlook
n. 1.观点，见解；２．展望，前景
A: Why did the output of the factory go down last month?
B: I hear that they were having some machine troubles.
output
n.　１．产量；２．输出，输出功率
vt.　输出（信息、数据等）
A: Well, we’ve been in college for four years now, and graduation is just around the corner.
B: From the outset we all knew that this day would come.
outset
n. 开始，开端
at / from the outset　开端，开始
A: I love the unique use of color and texture is this piece.
B: It truly is an outstanding painting.
outstanding
a.　１．突出的，杰出的，显著的；２．未解决的，未偿付的
A: Do you think that new student is an athlete?
B: Judging from his outward appearance, I would guess that he probably is.
outward
a.　外表的，向外的，外面的
ad. [-(s)]　向外
A: I’m such a bad drawer that all of my circles look like ovals!
B: Just try not to get discouraged.
oval
n.　椭圆形
a.　椭圆形的
A: What’s cooking in the oven?
B: A turkey for tonight’’s dinner.
oven
n.　烤箱，炉
A: How would you rate your team’s overall performance?
B: I think we really played a good game today.
overall
a.　１．总体的，全面的，综合的；２．全部的
ad.　总的来说
n.　［pl.］工装裤，工作服
A: How have you been able to overcome so many obstacles?
B: Through perseverance and endurance.
overcome
vt.　１．战胜，克服；２．（感情等）压倒，使受不了
A: Look at that hawk flying overhead.
B: It’s so graceful!
overhead
ad.　在头顶上
a.　在头顶上的，上面的，架空的
n.[常pl.]　经常费用，管理费用
A: I’d like to buy that beautiful house overlooking the lake.
B: I’m sorry, but that one’s already been sold.
overlook
vt.　１．忽视，忽略，未注意到；２．宽恕，宽容；３．俯瞰，俯视
A: Why do you think she became such an overnight sensation?
B: Perhaps she just appeared on the music scene at the right time.
overnight
ad.　１．在整个夜里；２．在短时间内，突然
a.　１．一整夜的；２．似乎在一夜之间出现的，突然的
A: How many years were you living overseas?
B: I lived overseas for a total of twelve years.
overseas
ad. 在（或向）海外，在（或向）国外
a.　（在）海外的，（在）国外的，（向或来自）外国的
A: If we row harder, we might be able to overtake the next boat and move into third place.
B: But I’m so tired that I can barely move my arms!
overtake
vt.　１．追上，赶上，超过；２．突然降临于，意外地碰上
A: How much money do you owe Jared?
B: Over a thousand dollars.
owe
v.　欠（钱），应给予，应该做
A: Owing to tonight’s rain, we’ve decided to cancel the concert.
B: Will it be rescheduled?
owing
a.　应付的，未付的
owing to 　由于，因为
A: Who is the owner of this car?
B: I am.
owner　物主，所有人
A: I feel a real ownership of this novel, because I spent so much time working on it.
B: You really did a great job.
ownership
n.　所有（权），所有制
A: Why can’t humans survive alone in space?
B: Because there is not enough oxygen.
oxygen
n.　氧气，氧