一、date back to 英[deɪt] 美[deɪt]追溯到……常见用法：1．动词+～advance the date提前日期bear the date注明日期break the date不遵守约定bring forward the date提前日期2．形容词+～closing date截止日期early date早期fixed date固定的日期future date将来的日期3.介词+～from that date从那时起on a certain date在某一日期out of date过时的to date到目前为止例句：All the objects are from the same excavation site in Sanxingdui and can be dated back to between 3,000 and 5,000 years ago. 所有的物品都来自于三星堆的一个挖掘点，时间可以追溯到3000到5000年前。
date back to＝date from因追溯是从现在算起指向过去，所以这个短语常用一般现在时。
This custom dates back to the 16th century.这风俗起源于16世纪。
This is an old building dating back to/dating from the 16th century.这是一栋追溯至16世纪的古老建筑物。
练习：1.英译汉My interest in stamp collecting dates back to/from my schooldays.2.Every day a number of tourists take pictures in front of the tower，which ________ as early as 800 years ago.A．dates back to B．is dated backC．dates back from D．was dated from答案：1.我从学生时代就开始爱好集邮。
2.选A。
短语date back to 相当于date from，意为“追溯到，始于”。
两者通常与过去的时间状语连用，但多用于一般现在时，且一般不用于被动语态。
句意：每天都有许多游客在这座可追溯到800年前的塔前拍照。
二、assume 英[ə'sjuːm] 美[ə'suːm] v．假定；设想；假装；承担常见用法：1．用作动词 (v.)～+名词assume a leading position担任领导职务assume a look of surprise装出吃惊的样子assume the right夺取权力2．～+副词assume baselessly毫无根据地认为assume falsely错误地认为assume groundlessly毫无根据地认为assume hastily匆忙地认为3．assume that 认为例句：So we think it is reasonable to assume they lived in these caves，regardless of the cold.因此我们有理由认为他们不顾严寒，就住在这些洞穴里。
(牛津P104)It is reasonable to assume that the economy will continue to improve.认为经济继续好转是有道理的。
(牛津P104)Let us assume for a moment that the plan succeeds. 咱们暂时假设计划成功。
(牛津P104)It is generally assumed that stress is caused by too much work.普遍认为，紧张是工作过重所致。
Assuming that the proposal is accepted，when are we going to get the money?假定这个建议被采纳，我们什么时候能拿到钱？练习：1.英译汉A lot of people make the assumption that poverty only exists in the Third World.2.We all can go out for a picnic this afternoon－________that the others agree.A．to assume B．assumedC．assume D．assuming答案：1.许多人认为贫困仅仅存在于第三世界。
2.选D。
assuming that...“假定……”。
类似表达有：providing/supposing (that)．..。
三、interrupt英[ˌɪntə'rʌpt] 美[ˌɪntə'rʌpt]v.打断；打扰；中断；阻碍n.[计算机]中断常见用法：1．～+名词interrupt the path阻断道路interrupt sb's speech打断某人讲话interrupt traffic中断交通interrupt the view遮住视线2．～+副词interrupt abruptly突然地打断interrupt constantly不时地打断interrupt earnestly认真地打断interrupt frequently频繁地打断3．～+介词be interrupted by被…打断〔阻断〕interrupt sb in his talk打断某人的话interrupt with打断例句：(牛津P1069)Sorry to interrupt，but there is someone to see you. 对不起打扰一下，有人要见你。
(牛津P1069)They were interrupted by a knock at the door.他们被敲门声打断了。
It’s bad manners to interrupt others when they are talking. 打断别人谈话是没礼貌的。
Let’s go somewhere where we can talk without interruption.我们去找个说话不受打扰的地方吧练习：1.英译汉I’m sorry to interrupt you but how could they live here? 2.________ ________ ________ ________ ________ ________ ________(打断别人是没有礼貌的)while they are having a conversation.答案：1.对不起，打断了你的讲话，请问他们怎么能够住在这个地方呢？2.It is bad manners to interrupt others四、significance 英[sɪɡ'nɪfɪkəns] 美[sɪɡ'nɪfɪkəns]n．意义；意思；重要性；重要意义常见用法：1．介词+～in its true significance在真正意义上a matter of significance重大事情2．形容词+～commercial〔historical〕 significance商业〔历史〕意义great〔little〕 significance重大〔无关紧要〕的事practical significance现实意义3．动词+～acquire〔attain〕 significance获得更广泛的意义attach significance to赋予…以意义explain significance说明意义realize the full significance of认识到…的全部意义例句：(牛津P1866)The new drug has great significance for the treatment of the disease.这种新药对于这种病的治疗有重大意义。
(牛津P1866)She couldn’t grasp the full significance of what he had said.她未能充分领会他那番话的意思。
Their change of plan is strange but I don’t think it’s significant.他们改变了计划十分奇怪，但我觉得没什么意义。
His university was aware of the significance of his work.他所在的大学知道他的工作的重要性。
练习：1.英译汉It is a matter of great significance.2.Only later________ ________ ________ ________ ________ ________(我们意识到真正意义)of his remark.答案：1.这是一个非常重要的问题。
2.did we realize the true significance五、arrest 英[ə'rest] 美[ə'rest]n．逮捕；拘留 vt. 逮捕；吸引常见用法：1．～+名词arrest sb's attention引起某人的注意arrest the bandit逮捕匪徒arrest sb's eye惹人注目2．～+副词arrest abruptly突然逮捕arrest arbitrarily任意逮捕arrest capriciously任意逮捕3．～+介词arrest for high treason因叛国罪逮捕arrest on a charge of指控犯…罪而逮捕arrest on suspicion作为嫌疑犯逮捕例句：(牛津P92)A man has been arrested in connection with the robbery.一名男子因与这桩抢劫案有关已被逮捕。
(牛津P92)You could get arrested for doing that.你干那种事可能要遭逮捕。
Fifteen persons were under arrest because of the serious violence.由于暴乱十五人被捕。
The beautiful sunset arrested our attention，and we stopped to watch it.美丽的日落吸引了我们的注意力，我们停下来观看。