prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

[例句] Two friends and I drove to Florida during college spring break...

[例句] Ramsay made a second visit to Italy.

n. 物体，目标，宾语，客体，对象；

[例句] He squinted his eyes as though he were studying an object on the horizon.

[例句] ...an object the shape of a coconut...

adj. 断开的；v. （打）开( open的过去式和过去分词 )，开始，睁开，启动；

[例句] He opened the window and looked out...

[例句] The church doors would open and the crowd would surge out.

adj. 相对的，对面的，对立的，[数学]（顶、边等）对的；prep. （表示位置）在…的对面，[数学]（顶、边等）对的，与…在一排，（表示方式）与…联合主演；adv. 在对面，对过；n. 对立面，对立物，相反的人[事物]；

[例句] Jennie had sat opposite her at breakfast.

[例句] ...the opposite corner of the room.

adj. 原始的，独创的，最初的，新颖的；n. 原文，原型，原件，怪人；

[例句] The original plan was to hold an indefinite stoppage...

[例句] The inhabitants have voted overwhelmingly to restore the city's original name of Chemnitz.

n. 空旷，开阔，公开，率真；

[例句] He opened the window and looked out...

[例句] The church doors would open and the crowd would surge out.

n. 排序，分类，调整，整顿；v. （医生）开（处方）( order的现在分词 )，订购，（上帝、命运等）注定，点（饭菜，饮料等）；

[例句] Most schools are extremely unwilling to cut down on staff in order to cut costs.

[例句] ...asking them to risk their lives in order that the rest of us can sleep better.

n. 选择（的自由），选项，选择权，选择能力；vt. 得到或获准进行选择，调动球员；

[例句] He's argued from the start that America and its allies are putting too much emphasis on the military option...

[例句] What other options do you have?

n. 开幕，开始，空缺的职位，[商]开盘，交易开始时间，（职位的）空缺；adj. 首次的，开始的；v. （打）开( open的现在分词)，开始，睁开，启动；

[例句] They returned to take part in the season's opening game.

[例句] ...the opening day of the fifth General Synod.

adj. 客观的，实体的，目标的，[语]宾格的，[医]他觉的；n. 目标，任务，[光]物镜，[语]宾语，宾格，[事]出击目标；

[例句] Our main objective was the recovery of the child safe and well...

[例句] His objective was to play golf and win.

vt.& vi. 观察，研究；vt. 遵守，观察，庆祝；vi. 注意，说，评述，当观察员；

[例句] Stern also studies and observes the behaviour of babies...

[例句] Are there any classes I could observe?...

v. （打）开( open的第三人称单数 )，开始，睁开，启动；

[例句] He opened the window and looked out...

[例句] The church doors would open and the crowd would surge out.

n. 套鞋，额外( over的名词复数 )，剩余，剩余（或多余）的量，剩余物；

[例句] He looked at himself in the mirror over the table.

[例句] ...a bridge over the river Danube.

n. （数字）0，零度；adj. 全无的，没有的；v. . 聚焦，集中；

[例句] Visibility at the city's airport came down to zero, bringing air traffic to a standstill.

[例句] ...a scale ranging from zero to seven.

n. 回声，共鸣，（言语、作风、思想等的）重复，重复者，[无线电]回波；vt. 重复，效仿，随声附和，类似，发射（声音等）；vi. 被重复，产生回响，充满回声；

[例句] He heard nothing but the echoes of his own voice.

[例句] His feet echoed on the bare board floor...

n. 无线电，收音机，无线电广播台，无线电收发报机；vt.& vi. 用无线电发送讯息，作无线电广播，用X射线拍照；

[例句] The last 12 months have been difficult ones for local radio...

[例句] The announcement was broadcast on radio and television.

adj. 无礼的，冒犯的，唐突的，讨厌的，令人不快的，进攻（性）的，攻击的，攻势的；n. 进攻，攻势；

[例句] Some friends of his found the play horribly offensive.

[例句] ...offensive remarks which called into question the integrity of my firm.

n. （基督教的）圣职，牧师职，命令( order的名词复数 )，秩序，（会议、议会等的）程序，次序；v. （医生）开（处方）( order的第三人称单数 )，订购，（上帝、命运等）注定，点（饭菜，饮料等）；

[例句] Most schools are extremely unwilling to cut down on staff in order to cut costs.

[例句] ...asking them to risk their lives in order that the rest of us can sleep better.

adj. 别的，其他的，（两个中的）另一个，其余的；pron. 其他的，（指两个人或事物中的第二个）那个，（指一组中其余的人或事物）其余的，（指与说话人所在位置等相反的方向或地点）另一边；n. [the other]对立面；对立的事物；

[例句] They were just like any other young couple...

[例句] The communique gave no other details.

n. 操作，经营，手术，[数]运算，作用；

[例句] The rescue operation began on Friday afternoon...

[例句] The soldiers were engaged in a military operation close to the Ugandan border.