bat back and forth

• 反复推敲(计划等)，详细讨论，随意地和非正式谈论(某想法、某主意等)：

  We batted back and forth the plan for a while, but in the end decided against it as we hadn't enough money.

  我们将这个计划随意地谈论了一会儿，最后因没有足够的钱而否定了它。