Complex sentence: The knoll is the highest point of the hill itself, from which it begins to slope downwards; on modern ski flying hills the table is placed considerably far back from the knoll, so as to reduce the steepness of the flight curve.
Split into simpler sentences: The knoll is the highest point of the hill itself, from which it begins to slope downwards. On modern ski flying hills the table is placed considerably far back from the knoll, so as to reduce the steepness of the flight curve.