Mr. Jones is a renowned international authority on the problem of overpopulation in developing countries.
琼斯先生在发展中国家人口过剩问题方面是声誉卓著的国际权威。
He's awful!He telephoned me four times Yesterday, and three times the day before yesterday.
他讨厌透了!他昨天给我打了4次电话,前天打了3次。