Skiing, hiking, riding a bike, and surfing are fun, but the exercise is incidental to the fun. Fun is great, but it's an inefficient way to get fit.

滑雪、徒步旅行、骑自行车和冲浪很有趣，但锻炼只是乐趣的附带品。

youdao

NO05, Riding a bike is fun and it's good exercise.

骑自行车很好玩而且是不错的运动。

youdao

NO05, Riding a bike is fun and it's good exercise.

骑自行车很好玩而且是不错的运动。

youdao