有一位女孩，在暑假期间，每天早晨7点离开家，乘坐两个小时的火车来到一所重点大学，在那里整天为美国宇航局做小白鼠失重的尖端研究。

• There was the girl who, during summer vacation, left her house before 7 each morning to make a two-hour train ride to a major university, where she worked all day doing cutting-edge research for NASA on weightlessness in mice.