stair well

例句：

1. 1. The stairs are steep and the wellis deep.
   楼梯陡峭，井深。
2. 2. Thestairwell was narrow and the wellwas dark.
   楼梯井狭窄且井深。
3. 3.The stairwell was narrow and thewell was dark.
   楼梯井狭窄且井深。