| 释义 |
DEFINITIVE EXAMPLES 权威例句〔ebb〕She sat in silence enjoying the ebb and flow of conversation.她默默地坐在那儿,饶有兴致地听着时高时低的谈话声。牛津高阶〔fluctuate〕His popularity has fluctuated during his term in office.任职期间,他受欢迎的程度时高时低。韦氏高阶〔up〕Her temperature went up and down in a most disconcerting way.她的体温时高时低, 让人十分担心。外研社新世纪 |