Complex sentence: The electrons of water's hydrogen atoms are strongly attracted to the oxygen atom, and are actually closer to oyxgen's nucleus than to the hydrogen nuclei; thus, water has a relatively strong negative charge in the middle, and a positive charge at the ends.
Split into simpler sentences: The electrons of the hydrogen atoms are strongly attracted to the oxygen atom, and are actually closer to its nucleus than to those of the hydrogens. Thus, the molecule has a strong negative charge in the middle, and a positive charge at the ends.