叫斜塔是因为它真的是斜向一边的。

The tower got its name because it really does lean to one side.

youdao

使船倾侧使（船）斜向一侧；使倾斜，使歪斜。

To cause(a ship)to lean to one side; tilt.

youdao

她向旁边斜看了一眼。

She gave an oblique look to one side.

《新英汉大辞典》

土地逐渐向河边下斜。

The land falls towards the river.

youdao

我们的土地逐渐向河边下斜。

Our property dips towards the river.

youdao

我们的土地逐渐向河边下斜。

Our property dips towards the river.

youdao