Complex sentence: Logarithms can be defined to any positive base other than 1, not just "e"; however logarithms in other bases differ only by a constant multiplier from the natural logarithm, and are usually defined in terms of the latter.
Split into simpler sentences: Logarithms can be defined to any positive base other than 1, not just "e". However, logarithms in other bases differ only by a constant multiplier from the natural logarithm, and are usually defined in terms of the latter.