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used to refer to a particular time in the past or future （指过去）当时，那时；（指将来）到那时，届时 Life was harder then because neither of us had a job. 那时生活比较艰苦，因为我俩都没有工作。 Things were very different back then. 以前那个时候情况大不相同。 She grew up in Zimbabwe, or Rhodesia as it then was. 她在津巴布韦长大，当时该地叫罗得西亚。 I saw them at Christmas but haven't heard a thing since then. 我在圣诞节见到过他们，但之后没听到过什么消息。 I've been invited too, so I'll see you then. 我也接到邀请，我们到那时见。 There's a room free in Bob's house next week but you can stay with us until then. 下星期鲍勃家会空出一个房间，不过在那之前你可以和我们住在一起。 Call again next week. They should have reached a decision by then. 下星期再来电话。到那时他们应该已作出决定了。 Just then (= at that moment) there was a knock at the door. 就在那时有人敲门了。 She left in 1984 and from then on he lived alone. 她于 1984 年离去，从那时起他便独自一人生活。 I took one look at the car and offered to buy it there and then/then and there (= immediately). 我只看了那辆汽车一眼，就当即表示要买下来。 Her voice sounded raspy, and it was then that she realized how thirsty she was. 她的声音听起来刺耳，就在这时，她意识到自己有多渴。
used to introduce the next item in a series of actions, events, instructions, etc. 然后；接着；其后；后来 He drank a glass of whisky, then another and then another. 他喝了杯威士忌，接着又喝了一杯，然后又喝了一杯。 First cook the onions, then add the mushrooms. 先炒洋葱，然后放进蘑菇。 We lived in France and then Italy before coming back to England. 我们在返回英格兰之前，先住在法国，后来住在意大利。 I took a week's vacation, then went back to Ohio. 我休了一个星期的假，然后回了俄亥俄州。
Language Bank processprocessDescribing a process 描述过程 This diagram illustrates the process of paper-making./This diagram shows how paper is made. 这个图说明了造纸的过程。
First/First of all, logs are delivered to a paper mill, where the bark is removed and the wood is cut into small chips. 首先，原木被运送到造纸厂，在那里去掉树皮，然后被切成木片。
Next/Second, the wood chips are pulped, either using chemicals or in a pulping machine. 接下来，用化学品或磨浆机把木片化成浆。
Pulping breaks down the internal structure of the wood and enables/allows the natural oils to be removed. 制浆过程使木材的内部结构分解，从而去除木材里的天然油。
Once/After the wood has been pulped, the pulp is bleached in order to remove impurities. /…is bleached so that impurities can be removed. 木材制成浆后，将其漂白以去除杂质。
The next stage is to feed the pulp into the paper machine, where it is mixed with water and then poured onto a wire conveyor belt. 下一步便是将纸浆送入制纸机，与水混合后再倒入金属传送带。
As the pulp travels along the conveyor belt, the water drains away. This causes the solid material to sink to the bottom, forming a layer of paper. 当纸浆沿传送带传送时，水分蒸发，使得固体物质沉到底部，形成一层纸。
At this point the new paper is still wet, so it is passed between large heated rollers, which press out the remaining water and simultaneously dry the paper/…dry the paper at the same time. 这时，新出的纸仍然是湿的，故让其经过几个巨大的热滚筒，挤压脱水并同时烘干。
The final stage is to wind the paper onto large rolls./Finally, the paper is wound onto large rolls. 最后一步是将纸卷在巨大的卷轴上。
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used to show the logical result of a particular statement or situation 那么；因此；既然如此 If you miss that train then you'll have to get a taxi. 如果你错过那趟火车，那就得坐出租汽车。 ‘My wife's got a job in Glasgow.’ ‘I take it you'll be moving, then.’ “我妻子在格拉斯哥找了份工作。” “既然如此，我想你要搬家了。” ‘You haven't done anything to upset me.’ ‘So what's wrong, then?’ “你没有做使我烦心的事。” “那你是怎么啦？” Why don't you hire a car? Then you'll be able to visit more of the area. 你怎么不租辆汽车？那样的话，你可以多参观些地方。
used to introduce additional information 另外；还有；再者；而且 - (formal)
used to introduce a summary of something that has just been said 总之 used to show the beginning or end of a conversation, statement, etc. （表示交谈、陈述等的开始或结束）那么
Word OriginOld English thænne, thanne, thonne, of Germanic origin; related to Dutch dan and German dann, also to that and the.
Idioms
…and then some
- (informal)
used to emphasize the large amount or number of something, and to say that you have not mentioned everything 而且还要多；而且远不只这些 There are Indian, Chinese, Mexican, Thai restaurants… and then some! 有印度、中国、墨西哥、泰国餐馆…，而且还有很多其他国家的餐馆！
but then | then again | but then again
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used to introduce additional information or information that contrasts with something that has just been said （引出另外情况或相对照的情况）不过，可是话又说回来了
(every) now and again/then
from time to time; occasionally 有时；偶尔；时常
(every) now and then/again
from time to time; occasionally 有时；偶尔；时常 Every now and then she checked to see if he was still asleep. 她不时地查看他是否还在睡觉。
now then
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used to show in a mild way that you do not approve of something （表示交谈、陈述等的开始或结束）那么 used when making a suggestion or an offer （提出建议或提供帮助）喂，听我说