Although leaders are often thought to be people with unusual personal ability,

decades of reserach have fail to produce consistent(一致的) evidence

         that there is any category of "natural leaders".

1、词汇

1. consistent(一致) 一致的; 连续的; 不矛盾的; 坚持的;

2.  are (often) thought to 

3. unusual personal ability 

4. fail to 

5. any category

2、语法

1. Although引导定语从句 尽管.........但是........... 后面不能加but

Although this expressive leader be thought to be capable of fulfilling various hard work, he has never been arrogant.

2.have fail to procude consistent evidence that (从句.....There be句型)there is any category of natural leaders

Only consistent work hard can we succeed.

英语----托福阅读----长难句5