He was born as an illegitimate child and experienced many difficulties.

My grandfather used to till his privately-owned rice field.

He holds a personal grudge against me.

Using the private railway makes commuting very convenient.

He was able to turn his designs into physical form using his new 3D printer.

I made a small robot with my new 3D printer.

Vitamin D2 is an important nutrient for bone health.

Vitamin D3 is an important nutrient for bone health.

Hepatitis D is a viral disease that is transmitted through blood.

Please look at this beautiful C comma butterfly.