我们享受了一个清爽的秋日。

We enjoyed a ___crisp autumn day.

那是这些美丽的清爽九月天之一，树林被秋日的棕褐色和金色装饰着。

It was one of these beautiful ___crisp September days when the woods are adorned in autumnal browns and golds.

清爽的早晨空气令人振奋。

The ___crisp morning air was invigorating.