join、combine、unite、connect、link、attach、couple、associate与relate这些动词均有“连接、结合、联合”之意。
join : 侧重把原来不相连接的物紧密地连接在一起，但仍可再分开。也指把分散的人或几个部分的人联合起来，或加入到某团体中去。
- I don't have time for a drink now, but I'll join you later.
我现在没有时间，稍后会和你们一起喝上一杯。 - Why don't you ask your sister if she would like to join us for supper?
为什么不问问你姐姐是否愿意和我们一起吃晚饭？ - We took the ferry across the Channel and then joined (= got on) the Paris train at Calais.
我们乘渡船过了英吉利海峡，然后在加来上了去巴黎的火车。 - If you're buying tickets, please join the queue (= stand at the end of it).
如果你要买票，请排队。 - I'm sure everyone will join me in wishing you a very happy retirement (= everyone else will do this too).
我相信大家都会和我一样祝你退休生活愉快。 - The police have joined with (= they have begun to work with) the Drug Enforcement Agency in trying to catch major drug traffickers.
警方和缉毒队联手抓捕大毒贩。 - The design company is planning to join up with a shoe manufacturer and create a new line of footwear.
这家设计公司正计划与一家鞋厂联合推出一系列新鞋。
combine : 指两个或两个以上的人或物结合在一起。
- None of us has much money so let's combine what we've got.
我们谁都没多少钱，因此就把我们所有的钱凑在一起吧。 - Sickness, combined with (= together with) terrible weather, contrived to ruin the trip.
疾病，加上恶劣的天气，毁掉了这次旅行。 - The two countries combined against their common enemy.
两国联合起来对抗共同的敌人。 - These normally harmless substances combine to form a highly poisonous gas.
通常情况下这些是无害物质，但混合在一起后会形成一种毒性很强的气体。
unite : 指联合、团结、结合在一起，构成一个整体。
- If the opposition groups unite, they may will command over 55 percent of the vote.
如果反对派能联合起来，可能会赢得55%以上的选票。 - If ever a dance company could unite the differing worlds of rock and ballet, the Joffrey Ballet is it.
如果有哪个歌舞团能把芭蕾和摇滚融合在一起的话，那这个歌舞团就是乔弗利芭蕾舞团。
connect : 指两事物在某一点上相连接，但彼此又保持独立。
- Can I connect my printer to your computer?
我能把我的打印机连在你的计算机上吗？ - Where does the stove connect (up) to the electricity?
这个炉子在哪儿接电源？ - Has the phone/electricity/gas/internet been connected (= switched on or joined to the main supply) in your new place yet?
你们的新居接通电话／电／煤气／互联网了吗？
link : 指连环式的连接，或用接合物或其它方式连接，还可指一事物与另一事物的联系或关系。
- The explosions are not thought to be linked in any way.
据信这些爆炸案之间没有任何联系。 - The use of CFCs has been linked to the depletion of the ozone layer.
据认为臭氧层的减少与含氯氟烃的使用有关。
attach : 指把局部连接在整体上，小的接在大的上面，活动的接在固定的上面。
- I attached a photo to my application form.
我在我的申请表上贴了一张照片。 - Use this cable to attach the printer to the computer.
用这根数据线连接打印机和电脑。 - In the UK , packets of cigarettes come with a government health warning attached to them (= on them).
在英国，香烟的包装盒上都印有政府的健康警示。 - I attach (= am sending, usually with a letter) a copy of our latest report.
兹附上我们的最新报告一份。
couple : 专指连接两件东西，或把事物成对进行连接。
- The sleeping car and restaurant car were coupled together.
卧铺车厢和餐车挂在一起。 - High inflation coupled with low output spells disaster for the government in the election.
低产出下的高通胀导致政府在选举中惨败。
associate : 指人与人友好和平、平等地联合在一起；用于物时，指两事物因历史或其它原因，很自然被人们联系在一起，即产生联想。
- Most people associate this brand with good quality.
大多数人把这个品牌和优良品质联系在一起。
relate : 指人与人有亲戚或婚烟关系；也指人或物之间尚存的实际或假想的联系。
- We need to explain why these issues are important and relate them to everyday life.
我们需要解释为什么这些问题很重要并且和他们的日常生活相关。 - Archaeologists hope to relate the discovery with the arrival of Vikings in the area in the tenth century.
考古学家希望把这些发现与公元十世纪维京人的到来联系起来。 - equations that relate variables of pressure, volume, and temperature
将压力、体积与温度相连的方程式
