If time travel is possible, where are the tourists from the future?
如果时空穿梭是可能的，那从未来穿越回来的旅客在哪里呢？
我认为人只有经过考验才能真正认识自己。
Customer satisfaction begins with understanding their unspoken needs and exceeding their expectations.
未来属于科学，也属于那些与科学为友的人。
自信来自于准备充分并精通自己的领域。