In fact, at the party he had spent an unnecessary amount of time with the woman he almost married – and hadn't even introduced her.
You will find sleeping to be an unnecessary luxury as well.
Causing unnecessary damage to the life and property of noncombatants.
It is unnecessary in this place to recapitulate the many results which had accumulated by the end of the 18th century, or to discuss the labours and theories of individual workers since these receive attention under biographical headings; in this article only the salient features in the history of our science can be treated.
A further generalization was effected by August Kekule, who rejected the hydrochloric acid type as unnecessary, and introduced the methane type and condensed mixed types.