In a soccer game, switching between offense and defense is important.

He was observing the stars using a telescope.

This area has a strong air defense system.

He is an important member of the secretariat.

He is painting in his own artist's studio.

We blocked off the river with an embankment to prevent flooding.

The levee is high and blocks the wind from the sea.

His success is due to his ingenuity.

I couldn't stand his outrageous argument.

Multicellular organisms, unlike unicellular organisms, have specialized cells in their bodies that perform functions.