It is dangerous to generalize about the poor.

　　對窮人一概而論是危險(xiǎn)的。

　　It's not just stupid—it's downright dangerous.

　　這豈止是愚蠢—簡直是危險(xiǎn)。

　　The journey would be dangerous in the extreme.

　　這段旅程將會是極其危險(xiǎn)的。