But while admitting to the fullest extent thewonderful achievements of labour, andrecognizing the fact that men of the mostdistinguished genius have invariably been foundthe most indefatigable workers, it mustnevertheless be sufficiently obvious that,without the original endowment of heart andbrain, no amount of labour, however wellapplied, could have produced a Shakespeare, a Newton, a Beethoven, or aMichelangelo.
词汇突破：
to the fullest extent 完全
indefatigable 不知疲倦的
distinguished genius 杰出的天才
Invariably 总是，不变的
Endowment天赋
主干识别：it must nevertheless be sufficientlyobvious that…
其他成分：while 引导的两个现在分词短语充当的让步状语：
while admitting to the fullest extent thewonderful achievements of labour, and recognizingthe fact that men of the mostdistinguished genius have invariably been found the mostindefatigable workers
that 引导一个主语从句：
without the original endowment of heart andbrain, no amount of labour, however wellapplied, could have produced a Shakespeare, a Newton,a Beethoven, or a Michelangelo.
其中主干为：no amount of labour could have produced a Shakespeare, a Newton, aBeethoven, or a Michelangelo.
注意： no amount of labour could have produced... =
amount of labor could not have produced...
其他成分： without the original endowment of heart and brain状语
however well applied 状语
参考译文：但是，我们虽然在一方面最大程度的承认劳动所创造的辉煌成就，也承认最杰出的天才永远是最不疲倦的辛劳着，但同时，有一点也是很明显的，那就是，如果没有心智固有的天赋，无论付出多少劳动，也无论这些劳动运用的有多么恰当，也无法创造出像莎士比亚，牛顿，贝多芬，米开朗基罗这样杰出的人物。