They refused to lay down their arms . 他们拒绝放下武器。
Many new railways have been laid down in the past few years . 过去的几年里铺设了许多铁路。
22. Lay these boards along , not across . 把这些木板直着放，不要横着放。
23. in a corner 在角落里
Piles of stones lie in a corner of the courtyard .
We found her crying in the corner of the classroom .
注意：in the corner 是侧重在 180 度以下的角。在讲到 180 度以上的角时介词可用 at / on / round / around + the corner 。
There is a bookstore on / at the corner . 在街道拐角处有个书店。
He is standing at a street corner .
24. watch over 看守，照看，监视，守卫
The work of cleaning the stones is watched over by three Indian chemists . 石头的清洗工作是由三名印度化学家监督的。
The mother bird is watching over her young . 雌鸟守护着她的幼雏。
The prisoners were watched over by policemen .
25. fill in 填满，填写
In order get a passport , you must fill in the official form . 要申请护照，你得先填写正式表格。
26. at midday = at noon 在中午
27. protect against / from 保护不受……的侵袭或者伤害
We wear dark glasses to protect our eyes against the sun .
You must protect those boys against danger .
An umbrella will protect you against the rain .
28. in battle 在战争中，在战斗中
Millions of people were killed in battle .
29. in search of 寻找
注意区别：in one\'s search for
30. carry on 继续下去，继续进行
Please carry on as usual while I am away . 我不在时，请照常干。
Conversation was carried on in English .
Now let\'s carry on with the work .
31. after sunset 日落后。
32. take on 呈现出新的面貌
After the thorough cleaning , our school took on a new look . 大扫除之后，我校呈现出了新的面貌。
Since 1978 , China has taken on a new look .
Under the vivid pen of the writer , these dry facts of history have taken on flesh and blood . 在这位作家生花妙笔之下，这些枯燥乏味的历史事实被写得有血有肉的。
The new leaders are making every effort to improve business management , and the factory is beginning to take on a new look . 新领导努力改善经营管理，工厂开始呈现新的面貌。
After the students put up a Christmas tree in the centre , the classroom took on a holiday appearance . 同学们在教室中央放了一株圣诞树，教室里呈现出一派节日景象。
33. fall into ruins 坍塌成废墟
Many of the stone figures had been stolen and others were falling into pieces . 许多石像被盗窃，另外一些石像崩裂倒塌。
34. be astonished by 被……弄得大为吃惊
be astonished to do 干……很吃惊
be astonished that 对……大为吃惊
35. cover an area of = take up an area of = occupy an area of = have an area of 占地面积……
This school covers an area of 500 square miles .
China has an area of about 9,600,000 square kilometres .
36. over a period of + 时间“历经……时间”
37. up until / to 直到，到……为止
The French , after discovering the ruined temple , did a lot of repair work up until 1970. 在发现这座满目疮痍的寺庙后，法国人做了大量的修复工作，直到1970年为止。
They had been built over a period of six centuries up till 1431 . 它们是1431年以前经过六个世纪才建成的。
38. do a lot of repair work 做大量的维修
39. in a poor state 处于破烂不堪的状态。