Anglais example sentences with "foci"

The foci of Buddhist and Christian soteriologies are different. Buddhism focuses on salvation from suffering, whilst Christianity from sins.
Translate from Anglais to Espagnol

Now the property of a circle is that every point of it is situated at the same distance from the centre, but in an ellipse there are two points within it, the "foci," and the sum of the distances of any point on the circumference from these two foci is constant.
Translate from Anglais to Espagnol