round-trip gain

例句：

1. 1. The company achieved a round-trip gain of $500,000 in the first quarter.
   该公司第一季度实现了50万美元的往返收益。
2. 2.The investment strategy yielded a round-trip gain of 20% over the last year.
   投资策略去年的回报率为20%。
3. 3. The airline's round-trip gain margin was 10%, which is higher than its competitors.
   该航空公司的往返利润率为10%，高于竞争对手。