之所以

Example sentences

• zhī之suǒ所yǐ以rú如cǐ此 。

  The reason why it's so.

• tā他zhī之suǒ所yǐ以chéng成gōng功 ，shì是yīn因wèi为jiān坚chí持 。

  The reason why he succeeded is persistence.

Usage