since英音：[sins]美音：[sɪns]副词ad. (常用于现在完成时或过去完成时)1.此后;从那时到现在She left school three years ago and has worked as a nurse ever since. 她三年前毕业,从那时起便一直当护士。
2.之前,以前介词prep.1.(常用于现在完成时或过去完成时)自...以来,从...至今I haven't heard from him since last year.我自去年以来未曾收到过他的信。
连接词conj.1.(常用于现在完成时或过去完成时)自...以来,从...至今It's been ten years since they married.他们结婚到现在已经十年了。
She has been living a hard life since her husband died.她自从丈夫死后,一直过着艰苦的生活。
2.既然;因为,由于He must have taken the book since it isn't here.他一定是把书拿走了,因为书已不在这里了。
Since it is so hot, let's go swimming.既然天气这么热,我们去游泳吧。
when副词ad.1.(用作疑问副词)什么时候,何时I'd like to know when they'll let him out.我想知道他们什么时候放他。
When did you last see Margaret?你上一次见到玛格丽特是什么时候?(用作关系副词,引导关系从句)当...时There were times when I didn't know what to do.有些时候我不知道该怎么办才好。
连接词conj.1.当...时John got engaged to her when travelling last winter.去年冬天旅行时,约翰与她订了婚。
Don't get excited when you talk.你说话时别激动。
2.既然,考虑到How can he get the promotion when his boss dislikes him?既然上司不喜欢他,那他怎么会获得提升呢?3.虽然,然而I had only fifteen dollars on me when the book I wanted cost twenty. (=but,however,while)我身上只带了十五元钱,可是我想买的那本书定价二十元。
4.在那时,然后代词pron.1.什么时候,那时Since when has she taught here?她从什么时候开始在这儿教书的?名词n.1.(事件发生的)时间[the S]come up with英音：['kʌm ʌp wið]美音：['kʌm ʌp wɪð]1.赶上We came up with a group of tourists.我们赶上了一群旅游者。
(针对问题等)想出;提供He came up with good ideas for the product promotion. 他想出一个推广产品的好方法。
He could not come up with a proper answer.他想不出一个合适的回答。
3.准备好(钱等)You must come up with the money by tomorrow night. 你明晚之前必须准备好钱。
fail英音：[feil]美音：[fel]名词n. [C]1.不及格a fail in math数学不及格不及物动词vi.1.失败Our plan has failed.我们的计划失败了。
He failed in everything he tried.他做一切事情都失败了。
2.不及格She failed in the examination.她这次考试不及格。
3.失灵;失去作用The engine failed.引擎出故障了。
4.(指健康)衰退;变弱;消失His hearing is failing.他的听觉在衰退。
5.破产;失去支付能力Many small banks failed during the recession.许多小银行在经济衰退期破了产。
6.缺乏,不足;(作物)歉收The crops failed for two years running.农作物连续两年歉收。
及物动词vt.1.失败;不能;忘记[Y][+to-v]He did very well, but failed to break the record.他做得很出色,但未破记录。
2.没有通过(考试),评定(学生)不及格The professor failed almost half of the class.该教授给班上几乎一半人评了不及格。
George failed history last semester.乔治上学期历史考试不及格。
3.使失望;有负于His courage failed him.他失去了勇气。
His friends failed him when he needed their help most. 当他最需要帮助的时候,他的朋友们却辜负了他。
4.舍弃(候选人等march英音：[mɑ:tʃ]美音：[mɑrtʃ]march1名词n.1.(大写)三月2.行进;行军;行程[U][C]3.进行曲[C]4.步伐,步调[U][C]5.进行,进展[the S][(+of)]His book describes the march of the civilization of a primitive society. 他的著作描述了一个原始社会的开化过程。
6.游行抗议,游行示威[C]She's been on a few marches lately.她最近参加过几次游行示威。
不及物动词vi.1.(齐步)前进;行军The soldiers marched by the reviewing stand.士兵们从检阅台前齐步走过。
2.走过,通过及物动词vt.1.迫使...前进;把(人)强行带走[O]The suspect was marched to the police station for interrogation.嫌疑犯被押赴警察局听候讯问。
intend英音：[in'tend]美音：[ɪn'tɛnd]及物动词vt.1.想要;打算[+to-v][+v-ing][+(that)][O2]He intends his son to manage the company.他打算让他儿子经营该公司。
I intend studying abroad.我打算出国留学。
I intend to study abroad.我打算出国留学。
Let's ask her what she intends us to do.让我们问她要我们做什么。
What do you intend to do today?你今天打算做什么?2.打算使...(成为);(为...而)准备[H][(+for/as)][O2]That trap is intended for you.那个圈套是为你而设的。
3.意指,意思是otherwise英音：['ʌðəwaiz]美音：['ʌðɚ,waɪz]副词ad.1.用别的方法;不同样地We'll get there somehow, by boat or otherwise.我们总要设法去那里的,乘船也好,用其他办法也好。
2.在其他方面;除此以外The rent is a bit high, but otherwise the house is satisfactory. 这所房子租金贵了点,但在其他方面倒是令人满意的。
3.否则,不然I'm not feeling very well today -- otherwise I would do it myself. 今天我身体不太舒服,否则这事我就亲自去做了。
seat英音：[si:t]美音：[sit]seat名词n.1.座,座位[C]Excuse me, is this seat taken?对不起,请问这座位有人吗?2.(椅子的)座部;(人或裤子的)臀部[S]3.席位,职位[C]His party has one third of the seats in Parliament.他那个党在议会中占三分之一席位。
4.所在地,活动中心[C][(+of)]Universities are seats of learning.大学是学术研究的场所。
5.(马等的)骑法,骑乘姿势[C]及物动词vt.1.使就座[H]He seated himself in a chair.他在椅子上坐下。
2.有...座位,容纳...人[W]The auditorium seats 3,000 people.这个礼堂可坐三千人。
3.安装(零件等)Seat名词n.喜悦(西班牙产轿车品牌名)go for it固定词组ph.1.【俚】努力争取;冒险尝试;大胆一试When she heard about the chance for promotion, she decided to go for it. 当她听到升迁的机会时,她决定冒险一试。
attend英音：[ə'tend]美音：[ə'tɛnd]及物动词vt.1.出席,参加He did not attend the meeting yesterday.昨天他没有参加会议。
2.上(大学等),前往The school was attended almost entirely by local children.上这个学校读书的几乎全是当地的孩子。
3.照料;护理;侍候There was no one to attend him but Tina. 除了蒂娜,再无人照顾他了。
4.伴随,带有5.陪同,护送不及物动词vi.1.出席,参加[(+at)]2.照料,处理[(+to)]I'll attend to the matter.我来处理此事。
3.护理;侍候[(+on/upon)]4.注意,倾听;致力(于)[(+to)]She didn't attend to what I was saying.她并不注意听我所说的话。