在2015考研暑期复习这段黄金期，同学们可以静下来心来认真备考各个科目。在这里，考研小编着重为大家分享考研英语暑期复习中长难句如何进行拆分和翻译。

　　Aluminum remained unknown until the nineteenth century, because nowhere in nature is it found free, owing to its always being combined with other elements, most commonly with oxygen, for which it has a strong affinity.

　　词汇突破：
Aluminum 铝
　　Free 元素的游离状态
　　Affinity 归属感
　　He has a close affinity with the landscape he knew when he was growing up...
　　他对这片从小就了解的土地有着一种归属感。
　　Affinity for 一种元素对于另一种元素的亲和力

　　主干识别： Aluminum remained unknown until the nineteenth century.
　　铝直到19世纪才被人发现;

　　其他成分： because nowhere in nature is it found free, owing to its always being
　　combined with other elements, most commonly with oxygen, for which it has a strong affinity.

　　微观分析：
1.because nowhere in nature is it found free
　　由于在自然界找不到游离状态的铝;
　　2.owing to its always being combined with other elements, most commonly with oxygen
　　由于它总是跟其他元素结合在一起;最普遍的是跟氧结合
　　3.for which it has a strong affinity.
　　Which= oxygen
　　It = aluminum
　　= aluminum has a strong affinity for the oxygen
　　铝跟氧有很强的亲和力。

　　翻译点拨：中文习惯先翻原因，再翻结果

　　参考译文：铝总是跟其他元素结合在一起，最普遍的是跟氧结合，因为铝跟氧有很强的亲和力，进而在自然界找不到游离状态的铝;所以，铝直到19世纪才被人发现。