This recipe is my family's secret.

He saw ball lightning bouncing from the window.

They overwhelmed the enemy using the strategy of blitzkrieg.

The contagiousness of this virus is very high.

My new electric bicycle is very fast.

He visited the ancient palace.

Action potential is an important mechanism for nerve cells to transmit information.

I commute by electric railway every day.

Please submit the expense sheet to the accounting department.

This information is transmitted wirelessly.