Purdue University has held tuition and fees flat since 2012.

普渡大学自2012年以来一直维持学杂费不变。

They say, no, it's a flat fee.

他们说，不，这是固定费用。

We charge a flat fee for car hire.

【flat，flatness】我们收取固定的租车费。

Shipt shoppers in those cities weren't getting paid that flat fee anymore.

这些城市的托运购物者不再获得固定费用。

Some may move to charging flat fees based on the service provided, rather than for the amount of time spent providing it.

有些人可能会转向根据提供的服务收取固定费用，而不是根据提供服务所花费的时间。

Walmart launched one of the only price innovations in pharmacy in 2006, by offering a limited list of medications for a flat fee of four dollars.

沃尔玛在 2006 年推出了药房唯一的价格创新之一，以四美元的固定费用提供有限的药物清单。