An expert was needed to authenticate the original van gogh painting from his imitation.
这幅画是梵谷的真迹还是赝品，需由专家来鉴定。
Companies found it difficult to find the expert CORBA programmers they needed.
公司不容易找到他们需要的有经验的CORBA程序员。
Companies found it difficult to find the expert CORBA programmers they needed.
公司不容易找到他们需要的有经验的CORBA程序员。
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