superficial

许多人觉得他肤浅，因为他只在乎外表。

Many people find him ___superficial because he only cares about appearances.

他对复杂的政治局势只有肤浅的理解。

He only has a ___superficial understanding of the complex political situation.

她肤浅的态度使她无法参与关于重要议题的深入对话。

Her ___superficial attitude prevents her from engaging in deep conversations about important issues.