Day after day, he continued to strive to solve the problem.

When a baby starts weaning, you begin to give them solid food little by little.

The baby has started to wean.

The Earth is our home.

Tom was proud of his knowledge and wisdom.

Daichi is my best friend.

My father is a doctor.

In the old days, people used to consider milk as an important source of nutrition.

He studies hard every day.

Darn, it's raining again.