zài / xiàn xià / jiào xué / yǔ / xiàn shàng / zī yuán / hé ér wéi yī / hòu / kè chéng / biàn dé / gèng jiā / fēng fù

在线下教学与线上资源合而为一后，课程变得更加丰富。

After offline teaching and online resources were combined into one, the course became much richer.