Swimming is good exercise.

游泳是有益的运动。

《牛津词典》

Running on the spot is good exercise.

原地跑步是一种很好的锻炼。

《牛津词典》

Cycling is good exercise. It strengthens all the muscles of the body.

骑车是好的锻炼。它使全身肌肉变得强健。

《柯林斯英汉双解大词典》

Diet is surely important, but diet alone will not do much good without an exercise plan.

VOA: special.2010.06.08

True godliness means imitation of God, the exercise of one's power In a manner that is godlike, good, life-affirming and so on.

真正的神性是效仿上帝，施展权力,用与上帝相仿的善良的方式。

耶鲁公开课 - 旧约导论课程节选

And I think too, a really good exercise if you wanted to do is, if you have a dictionary,

我也认为，如果你想练习，如果你有字典的话，比较好的练习

有这样的困难 - SpeakingMax英语口语达人

People should ask themselves why gold should be an exception to this general principle and whether this price-fixing exercise is a good way to determine the supply of dollars.

FORBES: Connect

"I think this study really helps to show that when you look across a lot of different people, exercise is a good thing, " Flynn says, noting that past studies have included far fewer women and older people.

CNN: Moderate exercise safe, healthy for heart-failure patients

The general feeling is that exercise during pregnancy is good from a psychological point of view.

BBC: Exercising during pregnancy