这部电影被定为R级，因为它包含了不适合年轻观众观看的内容。

The movie was rated R because it contained material ___unsuitable for younger viewers.

由于缺乏经验，他的申请被认为不适合这个高级职位。

Due to his lack of experience, his application was deemed ___unsuitable for the senior position.

在正式的婚礼上穿牛仔裤被认为是不合适的。

Wearing jeans to a formal wedding is considered ___unsuitable.