Ordinarily pleasure and pain are regarded as different from sensations.
通常，快乐和痛苦被认为与感觉不同。
-- Ernst Mach 恩斯特马赫
Ordinarily pleasure and pain are regarded as different from sensations.
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Ordinarily pleasure and pain are regarded as different from sensations.
通常，快乐和痛苦被认为与感觉不同。
-- Ernst Mach 恩斯特马赫
