Finally, a " round" is how many times you complete a group of circuit exercises.

最后，“一轮”是指你完成一组循环训练的次数。

It took Akeley four years to complete these groups, for as he went along he had to work out his method of constructing manikins and of making such background materials as artificial snow, moss, and leaves.

阿克利花了四年时间才完成这些作品，在制作过程中，他必须想出制作模型和制作人工雪，人工苔藓以及人工树叶等背景材料。