saucer-shaped depression of vitreous body

例句：

1. 1.The saucer-shaped depression in the center of the table is filled with water.
   桌子中心的凹形凹陷里装满了水。
2. 2.The scientist discovered a saucer-shaped depression on Mars.
   科学家在火星上发现了一个凹形凹陷。
3. 3. The team carefully excavated the saucer-shaped depression to find the lost treasure.
   团队小心翼翼地挖掘那个凹形凹陷，寻找失落的宝藏。