open up

Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++open up → open up at open2(10)

open up
open up phrasal verb (see also open)
1. OPPORTUNITY if opportunities open up, or a new situation opens them up, they become available or possible:

With a microscope, a whole new world of investigation opens up.
open something ↔ up

The new international agreement opens up the possibility of much greater co-operation against terrorism.
2. LAND open something ↔ up if someone opens up an area of land, they make it easier to reach and ready for development:

The new road will open up 300 acres of prime development land.
3. DOOR/CONTAINER ETC to open something that is closed, locked, or covered:

Open up, this is the police!
open something ↔ up

He opened up his case and took out a clean sweater.
4. SHOP/OFFICE ETC
  a. if a shop, office etc opens up or is opened up, someone starts it
  b. if a shop, office etc opens up at a particular time, it starts business at that time
5. DISAGREEMENT/DISCUSSION open something ↔ up to start a discussion or argument:

The article was written with the intention of opening up a public debate.
6. COMPETITION/RACE if someone opens up a lead in a competition or race, they increase the distance or number of points by which they are winning
7. TALK to stop being shy and say what you really think:

Last night was the first time that Ken had opened up about his feelings.
8. WITH A GUN to start shooting
9. HOLE/CRACK ETC if a hole, crack etc opens up or is opened up, it appears and becomes wider

●ˌopen sth↔ˈup

●ˌopen ˈup

to become or make sth possible, available or able to be reached （使某事物）成为可能，可得到，可达到

◆The railway opened up the east of the country. 铁路使这个国家的东部不再闭塞。

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◆Exciting possibilities were opening up for her in the new job. 新工作为她带来了令人兴奋的发展前途。

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to begin business for the day; to start a new business 开门；营业；开业

◆I open up the store for the day at around 8.30. 我的店每天早上大约 8:30 开门。

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OPP

close up

to start a new business 开张；开业

◆There's a new Thai restaurant opening up in town. 城里有一家新的泰国餐馆开张了。

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OPP

close down

to develop or start to happen or exist; to develop or start sth 发展；开始发生；出现

◆A division has opened up between the two ministers over the issue. 两位部长在这个问题上出现了分歧。

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◆Scott opened up a 3-point lead in the first game. 斯科特在第一局就以 3 分领先。

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to appear and become wider; to make sth wider when it is narrow or closed 张开；裂开；拓展；打开

◆The wound opened up and started bleeding. 伤口裂开，开始流血。

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◆The operation will open up the blocked passages around his heart. 手术将把他心脏周围被堵塞的通道打开。

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OPP

close up