If you say that something does not happen or is not done unduly, you mean that it does not happen or is not done to an excessive or unnecessary extent.
双语例句
例：
'But you're not unduly worried about doing this report?'—'No.'
“但你没有过分担心作这个报告？” “没有。”
例：
This will achieve greater security without unduly burdening consumers or the economy.