Słownik angielskiego

As was stated earlier, the origin of the name Gainesville has not been established conclusively.

The gap is clearly somehow related to the moon but the origin of this connection has not been established.

The origin and history of the beef on weck sandwich is not well established.

AN odd-looking horse on wheels is unusual because its origins are well established.

The origin of the virus has not been established.

The origin of the initial protonation step has not been conclusively established.

The origin of the name Authie has not been established with any certainty.

The origin of the name Živinice is still not established.

The origin of the town's name has not been established.

The exact origins of the expression have not been clearly established.