原句分析：The farm manager is assisted by two employees dedicated to taking care of the scorpion and extracting their venom when required 谢谢！！！！
第1个回答 2020-02-17
be dedicated to 是做后置定语，但是没有省略be。
when required 中间有省略"it was "。
when required 中间有省略"it was "。
第2个回答 2020-02-17
是的，用作非谓语动词时就要把表示时态的特征去掉。
