knock sb. down with a feather

例句：

1. 1. Hewas so angry that he knocked his frienddown with a feather.
   他非常生气，用羽毛把朋友打倒在地。
2. 2. The oldman was knocked down with a feather bythe young boy's playful gesture.
   那个老人被小男孩的顽皮举动用羽毛打倒在地。
3. 3. The child was soscared that she fell to the ground,knocking down her doll with afeather.
   孩子吓得摔倒了，用羽毛把玩具娃娃打倒在地。