We enjoyed a picnic in the suburbs.

He stood up against the enemy.

He is doing special exercises to strengthen the incisivus labii superioris muscle.

This chamfered cube is one of the shapes in mathematics, and it has the characteristic that all faces are equal.

My high school has very strict rules.

His filial piety towards his parents is wonderful.

He is truly a dutiful son to his parents.

He visits his parents' house every weekend for filial piety.

The technology of artificial rainmaking greatly contributes to agriculture in arid regions.

She successfully made her high school debut.