副詞 at random:

1. in a random manner
   同義詞：randomly, indiscriminately, haphazardly, willy-nilly, arbitrarily, every which way

1. Chose a card at random from the deck.
   從一副牌中任意選出一張
2. The librarian took a book at random from the shelf.
   圖書管理員從書架上隨便拿了一本書。
3. By mere chance or fortune; at random.
   碰巧; 胡亂地; 隨意地
4. Soiled dishes were piled at random.
   臟碟子胡亂地堆放著。