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1、operation
（由大量人员参与、具有高度组织性的）活动，行动，工作
The rescue operation began on Friday afternoon.
救援行动于星期五下午开始。
The soldiers were engaged in a military operation close to the Ugandan border.
这些士兵参加了乌干达边境附近的一次军事行动。
企业；公司
Thorn's electronics operation employs around 5,000 people.
索恩的电子公司雇用了约5,000名员工。
The two parent groups now run their business as a single combined operation.
这两个母公司现在合并为一家企业经营业务。
使用；运作
Until the rail links are in operation, passengers can only travel through the tunnel by coach.
在铁路连线开通之前，乘客只能乘坐长途客车穿越隧道。
the free banking system that has been in operation since the early eighties.
从80年代初就开始实行的自由银行制度
（使）施行；（使）实行；（使）生效
The Financial Services Act came into operation four years ago.
《金融服务法》于4年前开始实施。
Cheaper energy conservation techniques have been put into operation in the developed world.
更经济的节能技术在发达国家已经投入使用。
2、recover
恢复健康；复原
He is recovering from a knee injury.
他的膝伤正在康复。
A policeman was recovering in hospital last night after being stabbed.
一名警员昨夜被刺伤之后入院进行康复治疗。
（从不开心或不愉快的经历中）恢复，复原
a tragedy from which he never fully recovered.
他一直未能完全从中走出的悲剧
Her plane broke down and it was 18 hours before she got there. It took her three days to recover.
她乘坐的飞机出了故障，18个小时后她才到达那里。之后她花了3天时间才完全恢复过来。
（从弱势或困境中）好转，扭转，恢复
He recovered from a 4-2 deficit to reach the quarter-finals.
他在2比4落后的情况下实现逆转闯进1/4决赛。
The stock-market index fell by 80% before it began to recover
股市指数下跌了80%后才开始反弹。
