1、achievement
成就;成績;功績
Reaching this agreement so quickly was a great achievement.
如此快速達成這項協定是一大偉績。
The Conference will be a celebration of women's achievements.
該會議將成為對女性成就的一曲贊歌。
完成;達到;實現
Only the achievement of these goals will bring lasting peace.
只有達成這些目標才會帶來持久的和平。
2、operation
（由大量人員參與、具有高度組織性的）活動，行動，工作
The rescue operation began on Friday afternoon.
救援行動于星期五下午開始。
The soldiers were engaged in a military operation close to the Ugandan border.
這些士兵參加了烏干達邊境附近的一次軍事行動。
企業；公司
Thorn's electronics operation employs around 5,000 people.
索恩的電子公司雇用了約5,000名員工。
The two parent groups now run their business as a single combined operation.
這兩個母公司現在合并為一家企業經營業務。
使用；運作
Until the rail links are in operation, passengers can only travel through the tunnel by coach.
在鐵路連線開通之前，乘客只能乘坐長途客車穿越隧道。
the free banking system that has been in operation since the early eighties.
從80年代初就開始實行的自由銀行制度