那个童话故事里的反派试图偷走公主的魔法项链。

The ___villain in the fairy tale tried to steal the princess's magic necklace.

电影中的反派角色总是试图破坏主角的计划。

The ___villain in the movie always tries to ruin the hero's plans.

缺乏睡眠是导致他工作效率低下的罪魁祸首。

Lack of sleep was the ___villain behind his low work efficiency.