3 sentences

1. 许多游客在机场兑换外汇。

   xǔ​duō yóu​kè zài jī​chǎng duì​huàn wài​huì.

   Many tourists exchange foreign currency at the airport.

   Source: Dong Chinese Dictionary

2. 他在一家大型银行担任外汇交易员。

   tā zài yī jiā dà​xíng yín​háng dān​rèn wài​huì jiāo​yì​yuán.

   He works as a foreign exchange trader at a large bank.

   Source: Dong Chinese Dictionary

3. 由于市场波动，银行决定调整其外汇头寸。

   yóu​yú shì​chǎng bō​dòng, yín​háng jué​dìng tiáo​zhěng qí wài​huì tóu​cùn.

   Due to market fluctuations, the bank decided to adjust its foreign exchange positions.

   Source: Dong Chinese Dictionary