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。
Aunt Harriet presided over an invisible army of servants that continuously scrubbed, cleaned, and polished.
哈丽特姑妈统率着一支看不见的佣人大军,他们不停地擦拭、清扫、刷洗。