adj.無精打采的
Because of the death of his mother he is listless all day. 因為母親的去世，他整天無精打采的。
She was very listless after her illness. 她病后懶洋洋的。
People are always listless on summer afternoons. 夏天的午后，人們總是無精打采的。
adv.無精打采地（listless的副詞形式）
n.倦怠；無精打采
