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.
例句
'But you're not unduly worried about doing this report?' — 'No.'...“但是你没有过于担心如何写这个报告?”——“没有。”This will achieve greater security without unduly burdening the consumers or the economy...此举可提高安全性,而不会给消费者和经济增加过多的负担。