Mary's gone to work but her car's still there. She must have gone by bus.
must
用在肯定句中表示有把握的推测译为一定
后跟完成时的时候表示对过去事情的肯定推测
should have done /ought to have done表示本应该做却没有做
could have done 表示本可以做却没有做
It is necessary that he hand in the assignment without delay.
当形容词为necessary, important, impossible, strange, natural, essential等时，在It+be+adi+that-clause结构中，that引导的subject clause 要用虚拟语气（subjunctive mood）,从句中的谓语动词为should+v原形，其中should 可以省略
We've seen the filmyet（×）
yet用于否定句和疑问句，而此句为陈述句
During the summer vacation,kids are often seen hanging about in the streets.
hang about （在某处）闲呆，闲荡
hang on 紧紧抓住，不挂断
hang over （不愉快的事）威胁着，使担心
hang out （非正式）泡在某处，与……经 常在一起，晾晒
In the face of unexpecte difficulies, he demonstrated a talent for quick, decisive action.
decivise 果断的 devise 设计
determine 坚定
defensive 防御的，保卫的
demanding 要求高的，吃力的
The police had diffculty in restraining the fans from rushing on to the stage to take photos With the singer.
restrain 阻止，抑制（~sb from doing sth）
limit指事先确定空间，时间或数量的极限
confine侧重施加不可逾越的限制，有时指束缚，囚禁
restict 限制，指限制某物的的大小，数量等
His indulgence in gambling（赌博） has eventually brought about his ruin
indulgence 放纵，沉溺与in搭配使用
engagement约定，联系
constant 连续不断的，始终如一，恒定
The teacher told the students to stay in the classroom and they did accordingly.
He listened hard but still couldn't make out what they were talking about.
make out 理解
make up 补足，构成，化妆
make over 转让
make upon 从……中获利，在……中赚钱
For the advertised position, the company offers a generous salary and benefits package.（优厚的薪酬和福利）
As there was no road , the travelers scrambled up a rocky slope on their way back.
scramble 攀爬
crawl 爬行（指贴地而爬）
she followed the receptionist down a luxurous corridor to a coosed door, on which the women gave a quick knock before opening it.
on which 引导的定语从句
I wonder if I could have a word wirh you. The past tense used in the sentence refers to a persent event for tentativeness
persent event for tentativeness试探性的现在时间
obligation （法律规定或者已经答应过别人）的义务
1.you did not feel under any obligation to tell him the truth.
2. they reminded him of his contractual obliginations.
The Bent Pyramid outside Cairo is believed to have been ancient Egypt's first attempt to build a smooth sided Pyramid.
is believed to have been指现在被认为
was believed to have been 过去被认为
I long to alleviate evil ,bit I can not.我渴望减轻罪恶，可是我做不到。
at its most basic 最基本的是……
only to learn 用在结果前表示令人失望的结果（to reveal an undesirable consequence.）
consequence
comprehension
arguably用在最高级前表达可以争论的意思。
offset 抵消
Prices have recently risen in order to offest the increased cost of raw materials.
recommendaction 推荐
recording n.
1. a vedio recording of the wedding（录像）
2.recording equipment（录制）
3. the recording of financial transactiond.（记载）
recollection n.
1.to the best of my recollection（如果我没有记错的话）记忆
2.to have a clear recollection of （对某事记忆清晰）往事，回忆的事
constitute v.
1. the increase racial tension constitutes a threat to our society（被认为或看做）是 ，被算作
2. female workers constitute the major of our labor work（组成，构成）
3. the committee was constituted 1974 by...（合法的）成立，设立
compose v.
1. ten men compose a committee（组成，构成）
2. he composed his last opera shortly before he died（作曲，创作音乐）
3.she wrote a letter to protest（撰写）
4.I frowned,making an effort to compose myself.（使镇静，使平静）
constructs
v.
1.when was the bridge constructed.（建造，修建）
2. well-constructed novel 构思巧妙的小说（组成，组建）
3. to construct a triangle（编制，绘制）
filed a lawsuit against 提起诉讼
numerical adj
the result are expressed in descending numerical order （数字的，用数字表示的）
numeral n.
Roman numeral System 罗马数字系统
countless adj.
the new treatment could save her life and the lives of countless others（无数的，数不尽的）
marine
marine life 海洋生物
maritime
a maritime museum海洋博物馆
maritime region 近海区域
oceangoing
an oceangoing tanker 一艘远洋游轮
（远洋的，驶向外洋的）
oceanic adj术语，与海洋有关的
oceanic fish
one's mind eye 在某人的脑海中
