The urachus is a structure that exists during the fetal period, connecting the bladder and the navel.

We should always remember the power of Kannon in difficult times.

The bow is in the bag and the sword is in the sheath.

In organic chemistry, hippurate is known as a compound of the amino acid glycine and benzoic acid.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.