1. He was on an expedition to explore the Antarctic.
    他参加探险队远征南极。

2.

2. They did an expedition to the Himalayas.
    他们到喜马拉雅山去考察了一次。

1. 远征;探险
    An expedition is an organized journey that is made for a particular purpose such as exploration.

    e.g. ...Byrd''s 1928 expedition to Antarctica.
           伯德1928年前往南极洲的探险

2. 远征队;探险队
    You can refer to a group of people who are going on an expedition as an expedition .

    e.g. Forty-three members of the expedition were killed.
           探险队中43名成员遇难。

3. 远足;短途旅行
    An expedition is a short journey or trip that you make for pleasure.

    e.g. Caroline joined them on the shopping expeditions.
           卡罗琳加入了他们的购物之旅。
    e.g. ...a fishing expedition.
           垂钓之旅

1. a journey organized for a particular purpose

2. a journey taken for pleasure

    e.g. many summer excursions to the shore
           it was merely a pleasure trip
           after cautious sashays into the field

    Synonym: excursionjauntoutingjunketpleasure tripsashay

3. a military campaign designed to achieve a specific objective in a foreign country

    Synonym: military expeditionhostile expedition

4. the property of being prompt and efficient

    e.g. it was done with dispatch

    Synonym: dispatchdespatchexpeditiousness

5. an organized group of people undertaking a journey for a particular purpose

    e.g. an expedition was sent to explore Mars