know no bounds; (talk)on and on; be without limitation (/limit) ? 每當(dāng)講起話來，他就講得～，至于聽眾對他的講話是否感興趣，他毫不在乎。Whenever he makes a speech,he talks on and on and does not care a straw whether his listeners were interested in his speech or not.
漫無止境
know no bounds;without limit 個人的欲望是～的。A man’s desire knows no bounds./科學(xué)的探索是～的。There is no limit to the exploration of science.
漫無止境màn wú zhǐ jìnɡ
漫：無邊無際。形容時間長或距離遙遠(yuǎn)，也形容人貪得無厭。know no bounds, be without limit, without limitation