1、descent

下降;降落

Sixteen of the youngsters set off for help, but during the descent three collapsed in the cold and rain.

16 名年輕人出發(fā)去尋求幫助，但在下山過(guò)程中有 3 人因寒冷和大雨暈倒了。

the crash of an Airbus A300 on its descent into Kathmandu airport.

空客 A300 在加德滿都機(jī)場(chǎng)降落時(shí)的墜毀

(形勢(shì)的)惡化;(人的)墮落，淪落

The only lasting solution lies in a political settlement. Without it, their descent into chaos will be guaranteed.

唯一的長(zhǎng)久之計(jì)是通過(guò)政治手段解決。否則，他們勢(shì)必會(huì)陷入一片混亂。

his swift descent from respected academic to struggling small businessman.

他從一名受人尊敬的學(xué)者到一個(gè)度日艱難的小商人的瞬間淪落

血統(tǒng);家世;出身

All the contributors were of African descent.

所有的撰稿人都是非裔人士。

2、operation

（由大量人員參與、具有高度組織性的）活動(dòng)，行動(dòng)，工作

The rescue operation began on Friday afternoon.

救援行動(dòng)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(dá)邊境附近的一次軍事行動(dòng)。

使用；運(yùn)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(zhǎng)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(shí)行的自由銀行制度

（使）施行；（使）實(shí)行；（使）生效

The Financial Services Act came into operation four years ago.

《金融服務(wù)法》于4年前開始實(shí)施。

Cheaper energy conservation techniques have been put into operation in the developed world.

更經(jīng)濟(jì)的節(jié)能技術(shù)在發(fā)達(dá)國(guó)家已經(jīng)投入使用。