... I admit that these examples are highly technical and therefore harder to understand, but technical editors and other technical publishing professionals must understand grammar, punctuation, and ... according to usage and are still changing today Thus, grammar rules may change and may be inconsistent, but usually have a functional basis This functional attitude toward grammar, and punctuation, is ... transverse and shear strain is calculated for each specimen (two strains) The transverse and the shear strain is calculated for each specimen The transverse and shear strains are calculated for...