speak without reserve;be very frank;say all one knows;speak by the card ;

He is honest and frank, and always says everything he knows without reserve.
他是个耿直之人, 一向知无不言,言无不尽.
来源:互联网摘选The normal way is for everyone to say all he knows and say it without reserve.
大家都做到“知无不言,言无不颈,这样就正常了.
来源:互联网摘选
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