oniondome

例句：

1. 1. The onion dome is a unique feature of the garden.
   洋葱圆顶是花园里独特的特征。
2. 2. The onion dome was designed to protect the plants from the sun.
   洋葱圆顶被设计来保护植物免受阳光直射。
3. 3. The onion dome was used as a symbol of protection during the ancient times.
   洋葱圆顶在古代用作保护的象征。