operation
UK [ˌɒp.ər'eɪ.ʃən] US [ˌɑ:.pə'reɪ-] noun
WORK 工作
ESSENTIAL uncountable
■the fact of operating or being active 运作，实施，工作•There are several reactors of the type in operation (= working) at the moment.目前有几个这样的反应堆在工作。 •We expect the new scheme for assessing claims to come into operation (= start working) early next year.我们预计明年初施行核定索赔的新方案。 ESSENTIAL uncountable
■the way that parts of a machine or system work together, or the process of making parts of a machine or system work together （机器或系统的）运作，运行；（对机器或系统的）操作，使用
IMPROVER countable
■a business organization 企业•Less profitable business operations will have difficulty in finding financial support.盈利较少的企业会很难得到财政资助。 IMPROVER countable
■an activity which is planned to achieve something （有目的的）活动，行动•a military/peacekeeping operation.军事／维和行动 •Following the earthquake, a large-scale rescue operation was launched.地震后发起了一场大规模的救援行动。 •[+ to infinitive] The operation to fly in supplies will begin as soon as possible.向这里空运补给品的行动会尽快展开。
UK [ˌɒp.ər'eɪ.ʃən] US [ˌɑ:.pə'reɪ-] noun
MEDICAL PROCESS 医疗方法
ESSENTIAL countable (UK informal op)
■when a doctor cuts a body for medical reasons in order to repair, remove or replace a diseased or damaged part 手术•a major/minor/routine operation大／小／常规手术 •an abdominal/cataract/transplant operation腹部／白内障／移植手术 •He's got to have an operation on his shoulder.他的肩部必须做个手术。 •[+ to infinitive] We will know in a couple of days if the operation to restore her sight was successful.我们几天后就能知道她恢复视力的手术是否成功。
UK [ˌɒp.ər'eɪ.ʃən] US [ˌɑ:.pə'reɪ-] noun
MATHEMATICS 数学
countable specialized
■a mathematical process, such as addition, in which one set of numbers is produced from another （数学）运算 |