Complex sentence: Absorbed water can lead to significant degradation of key parameters; it impairs tracking resistance, breakdown voltage, and dielectric parameters-e.g. relative dielectric constant of water is about 73, compared to about 4 for common circuitboard materials.
Split into simpler sentences: Absorbed water can lead to significant degradation of key parameters; it impairs tracking resistance, breakdown voltage, and dielectric parameters. Relative dielectric constant of water is about 73, compared to about 4 for common circuitboard materials.