n. technician
adj. professional
... 专门条款：special provision 专门人员：professional police officer 专门技能：Specialized skill ...
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有些角色需要由一个专门人员担任。
如果天然气关掉了，就需要找专门人员来把它重新打开。
If the gas is turned off, a professional will be needed to turn it back on.
这不是说，不设计这些建筑部分，而是说，这部分设计由专门人员建造完成。
That's not to say that these parts of the building aren't designed, but rather that this part of the design is done by the specialist who's doing the construction.
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