Laughter is surely one of humanity's greatest gifts, for the ability to laugh--- to appreciate the pleasure or
absurdity1（荒谬） in daily activities---- allows people, young and old alike, to keep problems in perspective. Children are natural laughers. In situations, both appropriate and inappropriate, the
chuckles2（咯咯地笑）,
giggles3（傻笑）, and
outright4 peals5（洪亮的） of laughter of children can emphasize their
innocence6, their
joyful7 ignorance of the problems of the world.
Levity8（轻率） among adults is,
unfortunately, far less common, but it is equally welcome. How fortunate are the adults who can react to potentiallyfrustrating situations--- a
collapsed9 tent, a split seam in a pair of pants, a surprise guest--- and see the
sheer（全然的） absurdity of their attempts to maintain absolute control. Laughter expresses pleasure, eases tension, and lifts the spirit,. It is a gift we should all share more often.
收听单词发音 
