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There are limits to how much sound a cello can make. That's part of the framing of acoustical instruments. Finding what those limits might be, and then trying to suggest perhaps even the illusion of going beyond is part of that kind of effort.

大提琴发出的声音是有限的。这是声学仪器框架的一部分。找到这些限制是什么，然后试着提出也许甚至是超越的幻想也是这种努力的一部分。

— Yo-Yo Ma 马友友