偏心圆

例句：

1. 1. The heart is a shape that looks like a half-moon, which is why it's called a "heart".
   心脏的形状像半个月亮，所以叫“心”。
2. 2. The heart is the center of the human body, and it's shaped like a "heart".
   心脏是人体的核心，形状像“心”。
3. 3.The heart is responsible for pumping blood around the body, just like a "heart" does.
   心脏负责在身体内循环血液，就像“心”所做的那样。