youthfulness ['ju:θflnəs]

例句:

• I wonder at her perennial youthfulness.
  我对她青春常驻感到惊讶.
  
• His youthfulness was as striking as hers.
  他和她一样青春逼人。
  
• 'I must say again that I heartily admire your gallantry and youthfulness.'
  “ 我必须再说一遍,我衷心佩服你老当益壮的侠义精神. ”
  
• The Jerusalem Quartet give a performance that is mature of insight whilst imbued with youthfulness and vigour.
  来自BBC
• Despite the youthfulness of its population, however, the nation has a high unemployment rate that is worrisome.
  来自VOA
• If you are growing old, or love the old and recognise their youthfulness, it breaks your heart open.
  来自THETIMES