Hái / zi / yǐ / jīng / zhǎng / dà / le / yīng / gāi / zì / jǐ / zuò / jué / dìng / fù / mǔ / yě / guǎn / bu / zháo

孩子已经长大了，应该自己做决定，父母也管不着。

The child is grown up and should make their own decisions; even the parents cannot interfere.