15世紀以來，心型符號通常被認為是精神和感情的核心，是情感的代名詞。

15世紀以來，心型符號通常被認為是精神和感情的核心，是情感的代名詞。

Results (English) 1:

Since the 15th century, the heart-shaped symbol is generally considered to be the core of the spirit and emotions, and is synonymous with emotion.

Results (English) 2:

Since the 15th century, heart symbols have often been regarded as the core of spirit and emotion and are synths for emotion.

Results (English) 3:

Since the 15th century, the heart-shaped symbol has been regarded as the core of spirit and emotion, and it is also the pronoun of emotion.