Mammals can maintain a constant body temperature.

A bat is a small mammal that is active at night.

She had a small flower in her hand.

He always works at nighttime.

Lactation deepens the bond between a baby and its mother.

The mother kangaroo is suckling her child.

The bird is flying in the sky.

It's difficult to master the use of the 'Hisha' in shogi.

We participated in the local cleaning activity over the weekend.

We are actively participating in local activities.