介绍:

G – General Audiences All ages admitted. Nothing that would offend parents for viewing by children.
所有年龄都允许。小孩看也不会引起家长的不愉快
PG – Parental Guidance Suggested Some material may not be suitable for children. Parents urged to give "parental guidance".
一些内容不适合小孩，建议在家长指导下观看
PG-13 – Parents Strongly Cautioned Some material may be inappropriate for children under 13. Parents are urged to be cautious.
一些内容可能不适合13岁以下的小孩，强烈建议家长要留意
R – Restricted Under 17 requires accompanying parent or adult guardian. Contains some adult material.
17岁以下的观看者需要有家长的陪同和监督。包含一些成人内容
NC-17 – Adults Only No One 17 and Under Admitted. Clearly adult.
17岁及17岁以下的小孩不允许观看。只允许成人观看