词典释义：
pl-n. 柔体杂技演员；柔软体操演员；（contortionist的复数）
While flexible joints are very useful to contortionists, some joints can become so loose that they are unstable.
灵活的关节对柔术演员来说至关重要，但他们的一些关节可能会变得很不稳固。
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