tóng / yí / ge / zì / zài / bù / tóng / cí / yǔ / zhōng / chū / xiàn / yì / dú / bìng / bù / hǎn / jiàn同一个字在不同词语中出现异读并不罕见。It is not uncommon for the same character to have different pronunciations in different words.