His part in the affair was quite open and aboveboard.

他参与这件事完全是正大光明的.

《简明英汉词典》

He was frank, open and aboveboard.

他胸怀坦白, 光明磊落.

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He is dignified, and open and aboveboard.

他堂堂正正, 光明正大.

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Their business was open and aboveboard.

他们的交易是公开的,光明正大的.

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Their actions are open and aboveboard.

他们的行为都是公开及光明磊落.

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