astern casing

例句：

1. 1. The ship's stern casing is made of strong steel.
   这艘船的船尾外壳是用坚固的钢材制成的。
2. 2.The scientist found the fossilized animal in the eastern casing of the cave.
   这位科学家在洞穴的东侧找到了这个化石动物。
3. 3. The ancient city was buried under layers of sediment, with only its eastern casing remaining.
   这座古城被沉积物层层覆盖，只有它的东侧外壳保存了下来。