His voice resounded mightily.

This epidemic is spreading all over the world.

This perfume contains ambergris, an expensive ingredient.

This perfume uses expensive ambergris.

The unity of knowledge and action means that knowledge and action become one.

He dug a hole in the ground and stored vegetables.

He participated in the anti-Japanese movement.

This medicine has a delayed effect, so you may not feel the effect immediately.

His project reflects his ingenuity.

It is important for men to regularly clean smegma.