Complex sentence: However the cost of coming out of a Unicode block to represent a single character and then going directly back in is 3 to 3⅔ bytes, this is more than the 2⅔ bytes needed to represent such a character as a part of a Unicode sequence.
Split into simpler sentences: However the cost of coming out of a Unicode block to represent a single character and then going directly back in is 3 to 3⅔ bytes. This is more than the 2⅔ bytes needed to represent such a character as a part of a Unicode sequence.