'Bitter' collocates with 'tears' but 'sour' does not.
bitter可与tears搭配，而sour则不可。
The sweet and sour vinegar astringent but not bitter strong spicy wine.
而醋有酸甜涩，却没有酒的香辣苦烈。
But the foundation of perception has not changed; sour, sweet, bitter and spicy are all the same.
但是感觉的基础没有变，酸甜苦辣的起因是一样的。
But the foundation of perception has not changed; sour, sweet, bitter and spicy are all the same.
但是感觉的基础没有变，酸甜苦辣的起因是一样的。
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