B：Want to meet for lunch this Saturday?
      这个星期六一起吃午饭吗？

A：Sorry, I can’t. I’m busy.
      对不起，不行。我很忙。

B：What are you doing?
      你在做什么？

A：I always do volunteer work on the first Saturday of every month.
      我每个月的第一个星期六总是要做义工。

B：What kind of volunteer work?
      是什么性质的义工？

A：I help out at the children’s hospital. I help plan activities.
      在儿童医院帮手。帮忙组织活动。

B：Oh, yeah?
      哦，是吗？

volunteer的解释

A：Yeah. It’s exciting. This month we’re doing crossword puzzles.
      是呀，很令人兴奋。这个月我们要做字谜游戏。

1. 志愿者;义务工作者;义工
    A volunteer is someone who does work without being paid for it, because they want to do it.

    e.g. She now helps in a local school as a volunteer three days a week...
           目前她在当地的一家学校做志愿工作，一周去3天。
    e.g. Mike was a member of the local volunteer fire brigade.
           迈克是当地消防队的一名志愿消防员。

2. 自告奋勇者;主动做事者
    A volunteer is someone who offers to do a particular task or job without being forced to do it.

    e.g. Right. What I want now is two volunteers to come down to the front...
           好了，现在我需要两个自告奋勇的人到前面来。
    e.g. Any volunteers?
           有没有人自告奋勇？

3. 自告奋勇;主动要求
    If you volunteer to do something, you offer to do it without being forced to do it.

    e.g. Aunt Mary volunteered to clean up the kitchen...
           玛丽阿姨主动要求清扫厨房。
    e.g. He volunteered for the army in 1939...
           1939年他志愿参军。

4. 主动提供（信息）
    If you volunteer information, you tell someone something without being asked.

    e.g. The room was quiet; no one volunteered any further information...
           房间很安静，无人主动提供更多的信息。
    e.g. 'They were both great supporters of Franco,' Ryle volunteered...
           “他们都是佛朗哥的忠实支持者，”赖尔主动说道。

5. 志愿兵;义勇军
    A volunteer is someone who chooses to join the armed forces, especially during a war, as opposed to someone who is forced to join by law.

    e.g. They fought as volunteers with the Afghan guerrillas...
           他们作为志愿军和阿富汗的游击队员并肩作战。
    e.g. Victory in the civil war had been achieved by a mainly volunteer army.
           一支主要由志愿军组成的队伍取得了内战的胜利。