This epicycloidal curve is used in mechanical engineering.

Oviparity is the mode of reproduction of animals that lay eggs.

The eclimeter measures the light intensity.

She studied leprology for years.

I will succeed at some point .

It's the order of things, we must accept it.

It's not actually a problem, but a complication.

He likes to deal rare items.

The threat of a sword of Damocles hangs over his head.

Bike commuting is an excellent way to get around the city.