a rack of bones

例句：

1. 1. The old man's body was found in the river with a rack of bones.
   老人的尸体在河里被发现，身上有一副骨架。
2. 2. The scientist studied the remains of an extinct animal to understand its life history.
   科学家研究了灭绝动物的遗骸，以了解其生活史。
3. 3. The skeleton of the ancient creature was discovered in the desert.
   古代生物的骨架在沙漠中被发现。