and writing the background for Family Album,U.S.A.--
为Family Album,U.S.A.撰写背景说明的年轻人
The World Trade Center, an office building for over 1200 firms employing about 50,000 people, is even higher at 411 metres.
世界贸易中心要高得多,有411米。它是一座办公大楼,楼里有1,200多家公司,大约有5万雇员。