adj.无精打采的
Because of the death of his mother he is listless all day. 因为母亲的去世，他整天无精打采的。
She was very listless after her illness. 她病后懒洋洋的。
People are always listless on summer afternoons. 夏天的午后，人们总是无精打采的。
adv.无精打采地（listless的副词形式）
n.倦怠；无精打采
