aerobics

n.有氧运动；健美操

I think I have to take an aerobics class now. 我想我得上些有氧运动的课程了。

Aerobics were more fun, including hula hooping. 有氧运动更加有趣，呼拉圈是其中的一个项目。

I would like to try aerobics, but it looks tough. 我想去学健美操，可是健美操好象很难。

I will sign up for an aerobics class. 我会和一个健美操班签订合同。