单词cross-trainer
n.: 多功能健身器;多功能运动鞋
网络: 训练鞋;交叉培训;着脚穿万能跑鞋
多功能健身器:
a piece of exercise equipment that you use standing up, with parts that you push up and down with your feet and parts that you hold onto and push with your arms
多功能运动鞋:
a type of sports shoe that can be worn for more than one kind of sport
复数:cross-trainers