Taking a walk is very good exercise为什么没有a very good exercise
5个回答

exercise做锻炼时是不可数名词,做练习时是可数名词.

Exercise is good for your heart and lungs.对您的心脏和肺,运动也是有益的.

I suggest you go on a diet and take more exercise

Try working through the opening exercises in this chapter...做一做本章节的开篇习题.

He took up piano lessons,combining standard classical exercises with his own attempts at Gershwin.他上钢琴课,一边进行标准的经典作品的练习,一边自己尝试练习格什温的作品.

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