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166. as a matter of course当然地，自然地 167. in(during)the course在 过程中 168. in due course(=without too much delay)没经过太久，到一定时候 169. on credit赊购;with credit以优异成绩;to ones credit使某人感到光荣;do sb. credit使 感到光荣 170.be critical of爱挑毛病的，批评的 171. cure sb. of+某种疾病治好某人的疾病 172.a danger to对 的危险;be in danger(of)处于 危险中;be out of danger脱离危险 173. to date(=so far，until now)到目前为止 174. out of date过时的;up to date新式的，时兴的;date back to可追溯到;date from从某时期开始(有) 175. deal with(=concern)论及 176. be in debt to sb.欠 的债 177. on the decline在衰退中，在减少中in decline下降;on the increase在增加 178. to ones delight令某人感到高兴;to ones regret遗憾;sorrow悲痛;relief安心;distress苦恼;shame羞愧;surprise惊奇;astonishment惊奇; 179. delight in(=take great pleasure in doing sth.)喜欢，取乐 180. take(a)delight in 喜欢干 ，以...为乐 | 
