我们在机场相遇纯属巧合。

It was ___pure coincidence that we met at the airport.

当她看到惊喜时，脸上洋溢着纯粹的喜悦。

Her face lit up with ___pure delight when she saw the surprise.

长跑后，冷水澡感觉像是纯粹的提神。

After a long run, a cold shower feels like ___pure refreshment.