当UFO起飞的时候,Tom正在街上走着.（英语翻译）
问题描述：
当UFO起飞的时候,Tom正在街上走着.（英语翻译）
答
Tom was walking on the street when the UFO took of.
答
Tom was street walking when the Un-Identified Flying Object just took of.
答
Tom was walking in the street when the UFO took of