大约十年前，我还在上大学，当时我在学校自然历史博物馆里实习。有一天，当我在赠品店的收银机那里忙活时，看到一对年迈的夫妇，推着一辆轮椅走了进来，轮椅上坐了个小女孩。About ten years ago when I was an undergraduate in college, I was working as a

大约十年前，我还在上大学，当时我在学校自然历史博物馆里实习。有一天，当我在赠品店的收银机那里忙活时，看到一对年迈的夫妇，推着一辆轮椅走了进来，轮椅上坐了个小女孩。About ten years ago when I was an undergraduate in college, I was working as a