情人节，为什么送心形？

The heart shape is everywhere in love. 爱心图案，满世界都是。 But it does not look like a real heart. 可它和真正的心脏长得不太像。 Some say it came from a plant seed. 有人说它来自一种植物种子。 The seed has a similar round shape. 那种种子的形状，圆滚滚的很像。 Artists used it on old coins. 古代钱币上就印着这个图案。 Over time it became the love symbol. 慢慢的，它成了爱情的符号。 Love has its own drawing. 爱情，有了自己专属的图案。