Biān / chéng / shí / bú / yào / ràng / dài / mǎ / qiàn / tào / de / tài / shēn / fǒu / zé / hěn / nán / wéi / hù

编程时不要让代码嵌套得太深，否则很难维护。

When programming, do not nest the code too deeply, or it will be difficult to maintain.