What achievements did the Europeans borrow from the Arabs?

The Europeans developed in a different way than the Asian countries. But they borrowed some of the achievements of the Arabs in culture and science. In the Middle Ages, such famous scientists living in Arab countries as Avicenna, Lev the Mathematician and others were known. The Arabs were intermediaries between European and ancient culture. They adopted the achievements of the Roman Empire, and the European states took many scientific developments and cultural innovations from the culture of the Arabs. An exchange took place through interaction.