Yesterday, our country's airspace was violated by the enemy nation.

North Korea has violated our country's airspace again.

We installed a new flowmeter in the factory.

He exercises his rhomboid muscles at the gym every day.

兩唇音 is a type of sound produced using the lips.

The ritsuryō system was a system that ruled ancient Japanese society.

The shape of this chamfered cube is mathematically very interesting.

This is my new work, a chamfered cube.

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

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