[intransitive] (-pp-) to fall to a lower level; to become worse下降；退步；恶化◆Online retail sales slipped to $17 billion.在线零售额下滑至 170 亿元。◆The Nikkei slipped 0.67%.日经指数下跌了 0.67%。  ➡  see note at increase (used with an adverb or a preposition 与副词或介词连用) to pass into a particular state or situation, especially a difficult or unpleasant one陷入，进入（困难或不愉快的处境）◆The manufacturing sector is slipping into recession.制造业正陷入衰退中。◆We seem to have slipped behind schedule.我们好像已经落后于日程安排了。 ●ˌslip ˈup (informal) to make a careless mistake疏忽；不小心出错◆The agency had slipped up badly.这家机构出现严重差错。  ➡  slip-up