unrealistic

Hoping to master a foreign language in just one week is an unrealistic goal for most people.

(Chinese) 希望在仅仅一周内精通一门外语对大多数人来说是一个不切实际的目标。

The director was criticized for the movie's unrealistic special effects that looked like a video game from the 90s.

(Chinese) 导演因电影中看起来像90年代电子游戏的不真实特效而受到批评。