有誰知道《強復者 THE BRAVE ONE》內的那首英文歌是誰唱的？

i think you are talking about the one which is playing at the end.
if this is what you're looking for, it called ""Answer" by Sarah McLachlan.

here's the live version on youtube:
http://www.youtube.com/watch?v=fqTzd63hiWU

enjoy*

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by Mogwai