" He has a native ability for music, " or, " mathematics" perhaps.

“他天生就有音乐天赋，”或者“数学”也许。

From this fruitful source of native ability, self-educated, the American cause drew great strength in the trials of the Revolution.

从这种富有成果的本土能力、自学成才的源泉中，美国的事业在革命的考验中汲取了巨大的力量。

Courage, native ability, quickness of mind, and knowledge of the country they had in abundance, and in battles such as were fought during the Revolution all those qualities counted heavily in the balance.

勇气，天生的能力， 敏捷的头脑， 以及对他们所拥有的国家的了解，在革命期间进行的战斗中， 所有这些品质都很重要。