buy time

Verb

1. act so as to delay an event or action in order to gain an advantage

1. The union leaders are trying to buy time by prolonging the negotiations.
工会的领袖企图以延长谈判过程来拖延时间。

来自《简明英汉词典》

2. She thought fit to buy two expensive hats at that time.
她认为在那时买两顶很贵的帽子是很合适的。

来自《简明英汉词典》