Swiss ballˌSwiss ˈball noun [countable] trademark 
a large plastic ball that you sit on or lie against in order to do special exercises
a large plastic ball that you sit on or lie against in order to do special exercises
| 单词 | Swiss ball |
| 释义 | Swiss ballˌSwiss ˈball noun [countable] trademark a large plastic ball that you sit on or lie against in order to do special exercises |
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