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TOEFL BNC: 1316 COCA: 1444
active adj.
⇨ active (the active ingredient in aspirin) ⇨ busy 1 (active in politics) ⇨ energetic (physically active) active

adjective

active ♦︎ in operation ♦︎ in force ♦︎ in action ♦︎ up and running ♦︎ operationalThese words all describe sb/sth being able to do, or doing, the activity or work that is typical for them. 这些词均表示发挥功效或起作用。■ active doing sth regularly; functioning; having or causing a chemical effect 定期进行的；起作用的；起化学作用的◆These animals are active only at night.这些动物只在夜间活动。◆Numbers of sexually active teenagers have continued to rise.有性行为的青少年人数持续增加。◆The virus is still active in the blood.病毒仍然在血液中起作用。◆What is the active ingredient in aspirin?阿司匹林中的有效成分是什么？ OPP inactive ⓘ Inactive describes sb/sth that is not doing anything, is not in use or not working or has no effect. * inactive指不活动的、不使用的、不起作用的◆Some animals are inactive during the daytime.有些动物白天不活动。◆an inactive drug / disease失效的药物；非活动性疾病 ■ in opeˈration

idiom

 (rather formal) (of a system) working, being used or having an effect （系统）工作中，使用中，有效◆The system needs to be in operation for six months before it can be assessed.此系统须运行六个月后才能对它进行评估。◆Temporary traffic controls are in operation on New Road.“新路”正实施临时交通管制。ⓘ When a system comes into operation it starts working or having an effect. * come into operation表示开始运行或开始生效◆The new rules come into operation from next week.新规定下周开始生效。When you put sth into operation you start using it or make it start working. * put sth into operation表示开始使用或启动◆It's time to put our plan into operation.该是执行我们计划的时候了。   see also operate ⇨ organize , operate ⇨ work verb 3 ■ in ˈforce

idiom

(of a law or rule) being used （法律或规定）有效力，实施中◆The new regulations are now in force.新规定现已生效。ⓘ When a law or rule comes/enters into force it starts being used. * come/enter into force表示法律或规定开始实施◆When do the new regulations come into force?新规定何时开始执行？When you bring sth into force you make a law or rule start being used. * bring sth into force表示使法律或规定开始生效◆They are hoping to bring the new legislation into force by the end of the year.他们希望在年底前实施新法。 ■ in ˈaction

idiom

(of a person or thing) doing the activity or work that is typical for them （人或物）在活动中，运转中◆I've yet to see all the players in action.我还得看所有参赛者实地比赛。■ ˌup and ˈrunning

idiom

(of a system, for example a computer system) working; being used （系统，如计算机系统）在运转，在使用中◆By that time the new system should be up and running.到那时，新系统应该已经运转起来了。ⓘ Up and running is usually used to talk about sth starting to work or be used after a period of development. * up and running通常指经过一段时间的研发后开始运转或使用。   see also run ⇨ work verb 3 ■ operational [not usually before noun] (rather formal) ready to be used; in use 可使用；在使用中◆The new airport should be fully operational by the end of the year.新机场应该会在年底前全面投入运营。ⓘ Operational is very often used in the phrase fully operational. * operational经常用于短语fully operational中。   see also operate ⇨ work verb 3

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