heart可數嗎?

Heart-shaped cookie cutters come in many sizes.

有多種不同大小的`心形餅乾模具。

Her years of drunken bickering hardened my heart.

她常年醉酒吵鬧讓我的心麻木了。

Her heart was thumping as she ascended the stairs.

她上樓梯時，心怦怦跳個不停。