意思是 在施工的时候，你不能靠近工作区。
1.close
[英][kləʊz][美][kloʊz]
adj.
亲密的; 紧密的; 亲近的;
vt.
关; 结束; 使靠近;
vi.
关闭; 关; 结束;
adv.
紧密地;
n.
结束;
例句
Don't forget to close the window after you.
别忘了跟手儿关窗。
百度翻译例句库
A working relationship turned into a very close friendship.
同事关系变成了非常亲密的友谊。
这里close是动词应该是“靠近 接近”的意思
2.in progress 固定短语
in progress
[英][in ˈprəuɡres][美][ɪn ˈprɑɡˌrɛs]
进行中; 半路;
例句
The status bar also shows a work item ID and name if there is a work item in progress.
如果有一个工作项正在处理当中，那么状态栏还显示了这个工作项的ID和名字。
3.while 的用法
一、while作名词用，表示“一会儿”“一段时间” 1.She likes to lie down for a while after lunch. 她喜欢午饭后躺一会儿。 2.Coming to another country to study requires a big adjustment and it takes a while to fit in. 来到另一个国家求学，需要花一段时间来适应。 二、While作连词(1)引导时间状语 1.We must strike while the iron is hot.趁热打铁。 2.While she was listening to the radio，she fell asleep. 她听着收音机睡着了。 (2)引起让步状语从句，意思是“虽然…但是….”、“尽管…但是…”(多放于句首)1.While he loves his students，he is very strict with them.. 虽然他爱他的学生，可是他对他们很严格。 2.While these experiments are interesting and useful，it is important to remember that they may not always tell us much.(BookIIIp125) 虽然这些实验很有趣也有用，但是很重要的是要记住，这些实验也可能不会告诉你很多。 (3)引起条件状语，意思是“只要” 1.While there is life there is hope.只要生命存在，就有希望。 2.While there is a way there is away.有志者事竟成。 三、While作并列连词用，意思为“而，然而”，表对比。而but表转折。注意用心比较体会while与but的句中用意 1.Some people waste food while others haven't enough. 有些人很费粮食，然而有些人却吃不饱。 2.The son was having a good meal at home，while the parents were working in the fields. 儿子在家吃好饭而父母却在田里辛勤劳作。 3.I ought to have helped her，but I never could. 我本该帮她但没能。 4.Honey is sweet，but the bee stings. 蜂蜜很甜，但蜜蜂有刺蜇人。 四.while，when，as的用法区别都译为“当…的时候”，区别为：when后的从句谓语动词既可是延续性动词，也可是短暂性动词，而且还可作并列连词，译为“这时”。但以下句型一定用when，作并列连词： 句型A：be about to do…when…正要做…这时(发生另一事) 句型B：was/were doing…when…正在…这时(发生另一事) 句型C：had done…when…刚要做…这时(发生另一事) 1.We were about to set out when it began to rain. 我们刚要出发天突然下雨了。 2.He had hardly sat down when his mobile rang. 他刚一坐下手机就响了
while后的从句谓语动词只能是延续性动词，强调主从句的两个动词同时发生；while也可作并列连词，表示两个动作的对比，译为“而”“然而”。as则表示两个变化中的动作的同时性，译为“一边…一边…”。 1.While his mother was cooking in the kitchen，the boy fell asleep in the chair. (在一个延续动作过程中发生另一个动作
这里while 的意思就是“当，，，，，，的时候“
所以意思是 当在施工时，你不能靠近工作区。
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