这部电影的角色塑造很肤浅，主角完全是一个没有深度的形象。

The movie's characters are shallow, with the protagonist being completely ___one-dimensional.

这根绳子可以近似看作一维物体，因为它只有长度可测量。

This rope can be approximated as a ___one-dimensional object since it only has measurable length.