go underboard中文意思

题目

go underboard中文意思
On the same day,across town at the American Enterprise Institute—another conservative stronghold—Newt Gingrich,the former House speaker,was warmly received when he touted a new book called Real Change.Never one to go underboard,Ging­rich called for “explosively replac[ing] the failed bureaucracies of the past.”
The irony of the contrast seemed lost on conservatives.No one in the movement doubts Gingrich is a real,no-kidding conservative.Many doubt that McCain is.

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