exchange supplementary duties

例句：

1. 1. Theyexchanged their stories for a cup ofcoffee.
   他们用一杯咖啡换了彼此的故事。
2. 2.The company exchanged its old equipment fornewer models.
   公司用更先进的设备替换了旧设备。
3. 3. The students exchangedideas and opinions during the debate.
   在辩论中，学生们交换了意见和观点。