Due to good genes and an environment conducive to learning, these youngsters are vigorous, bright-eyed, healthy, and brimming with self-confidence as they engage the visitors in conversation.
的確，許是優生學加上環境優渥，這些小孩個個天庭飽滿、眼睛晶亮，膚色白透紅，神色間透著自信，對著來訪的客人侃侃而談。