BBC news 2010-10-25 加文本

1.Fears remain that the disease could still spread to the crowded camps on the outskirts of Port-au-Prince, where those made homeless by January's earthquake are still living.

参考翻译：现在，人们仍然担心疫情会传播到太子港外围拥挤的难民营。自1月份地震袭击以来，无家可归者一直居住在这里。

结构分析：where引导定语从句，修饰Port-au-Prince。that the disease could still spread是同位语从句，是Fears的同位语。

2.New clashes have been reported in Guinea, where the second round of the presidential election has been postponed indefinitely because of clashes between supporters of the two candidates.

参考翻译：由于两位候选人的支持者之间发生冲突，几内亚第二轮总统选举无限期推迟，从而引发了新的冲突。

结构分析：这句话的主干是：New clashes have been reported in Guinea。where引导的也是定语从句，修饰Guinea。because of表示原因。

3.It was on this day 50 years ago when the launch of a prototype rocket known as the R-16 went seriously wrong.

参考翻译：五十年前的这一天，R-16火箭原型的发射出现严重错误。

语法学习：It+be+被强调部分+that(强调部分指人做主语时时用who，指人做宾语时用whom)+句子的其他部分。
　　例如：
　　Mary met an old beggar in the street yesterday.
　　It was Mary who/that met an old beggar in the street yesterday.
　　(强调主语)
　　It was an old beggar whom/that Mary met in the street yesterday.(强调宾语)
　　It was yesterday that Mary met an old beggar in the street.(强调时间状语)
　　It was in the street that Mary met an old beggar yesterday.(强调地点状语)
　　注意：it强调句型不能强调句子的谓语。