vigorousness
 精力旺盛;健壯
 Vig·or·ous a.
 1. Possessing vigor; full of physical or mental strength or active force; strong; lusty; robust; as, a vigorous youth; a vigorous plant.
 Famed for his valor, young,
 At sea successful, vigorous and strong.   --Waller.
 2. Exhibiting strength, either of body or mind; powerful; strong; forcible; energetic; as, vigorous exertions; a vigorous prosecution of a war.
    The beginnings of confederacies have been always vigorous and successful.   --Davenant.
 -- Vig*or*ous*ly, adv. -- Vig*or*ous*ness, n.
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