听众 Shirley 想知道该怎样区分 “retain”、“remain” 和 “maintain”。这三个词都和 “保持相同的状态” 有关。“保留收据” 应该用哪个词？“保养汽车” 应该怎么说？本期节目通过实用例句，详细讲解三个近义词在用法上的区别。

NEW DELHI, Aug. 18 (Xinhua) -- China and India on Monday agreed to maintain momentum of bilateral ties. The consensus came from talks between visiting Chinese Foreign Minister Wang Yi and his Indian ...