phthinoid chest

例句：

1. 1.The phthinoid chest is a type of chest that has a unique appearance.
   这种独特的外观就是所谓的胸甲。
2. 2. The phthinoid chest was made from a material that was not commonly used in armor.
   这种胸甲是由一种不常用于制作盔甲的材料制成的。
3. 3. The phthinoid chest was considered to be a symbol of power and status in ancient times.
   在古代，这种胸甲被视为权力和地位的象征。