第三人称单数：dwells on 现在分词：dwelling on 过去式：dwelled on 过去式：dwelt on
1.细想详述仔细研究强调
2.拖长(发音)仔细打量,盯着看
3.减慢
1.to spend a lot of time thinking or talking about something unpleasant
dwells ondwells ondwells on