n.有氧運動；健美操

I think I have to take an aerobics class now. 我想我得上些有氧運動的課程了。

Aerobics were more fun, including hula hooping. 有氧運動更加有趣，呼拉圈是其中的一個項目。

I would like to try aerobics, but it looks tough. 我想去學健美操，可是健美操好象很難。

I will sign up for an aerobics class. 我會和一個健美操班簽訂合同。