Based on your past experience you know the water will be cool and refreshing, and playing in the waves will be fun, so you decide to go for a swim.

据以往的经验你知道水将变凉而且使你精神振作，在水里玩玩肯定很有意思，所以你决定去游泳。

youdao

Ice cream is fun stuff — so cool, so smooth, so creamy!

冰淇淋真是个有趣的东西——冰凉爽滑、奶味十足！

youdao

Today the weather was cool, so we decided to play tennis. We played all morning. It was really fun. We had Sichuan food for dinner. It was delicious!

今天天气凉了，所以我们决定去打网球的。我们踢了一上午。这很有趣，四川菜吃晚饭。很好吃！

youdao

So it's fun. Everybody's drinking and it's cool.

很有意思。在那里喝两杯感觉很好。

充满乐趣 - SpeakingMax英语口语达人

Or perhaps it's the other way around: The Audi A6 driver may feel so cool--and may be having so much fun--that he doesn't mind if things aren't perfect.

FORBES: Magazine Article

"We see them as super-cool because they look like they're having so much fun, " Meissnitzer said.

WSJ: Skiing: Is America the New Austria? Lindsey Vonn,