BBC news 2010-01-30 加文本

rarely是频度副词

频度副词表示动作发生的次数，常见有的ever, never, rarely, seldom, once, often, occasionally, constantly, frequently, usually, continually, always 等。

【注】含有否定意义的频度副词置于句首时，其后要用倒装语序：

Never have I been there. 我从未去过那儿。

Seldom does he see a film. 他很少看电影。

另外，频度副词always 和 never通常不位于句首，除非是祈使句：

Always remember this. 时刻记住这一点。

Never go out at night. 晚上千万不要出去。

2.Given the analysis of what they might be and we, we worked them out.

work out作出; 制订出

例句：It wasn't too long before we had worked out a plan acceptable to all.
      没多久我们就制订出一个大家都能接受的计划。

      The plan has already been worked out, and could be put into operation at a moment's notice.
      计划已经拟好并立即可以付诸实施。

3.Earlier, he had been at pains to say how much the events of 9/11 changed his view of Iraq.

at pains尽力,用心

例句：The teacher was at great pains to make sure that we all understood.
      老师尽了很大努力确保我们都能理解。

4.Despite that, Mr Blair maintained that the invasion was legal and that Iraq and the world were better off without Saddam.

be better off更富裕；生活更好

例句：We are much better off now.
      我们现在的生活好多了。

      Today's pensioners are better off than they used to be.
      现在靠养老金生活的人经他们原来生活要更好些。

5.Doctor Tiller performed abortions; in particular he offered late-term abortions, which had made him the target of anti-abortion activists for many years.

in particular尤其, 特别

例句：She likes fruit and tomatoes in particular.
      她喜欢水果, 尤其是西红柿。