Smart phones are an indispensable part of our daily life now. Listening to songs, watching science fiction films, playing mobile games, navigating in a strange city, taking various online courses... with a small smart phone, there are many things we can do killing spare time and making life easy and enjoyable. With a smart phone connected to the internet, many challenges set by time and space can finally be overcame. But just as a coin has two sides. Despite all the benefits brought by the gadget, we can not ignore the potential bad effects caused by smart phones. Long-term heavy use of them can be harmful to both physical and mental health. Besides, discusses about privacy disclosures never lack attention.
To sum up, we should use smart phones in a proper way. Only then can they bring convenience rather than troubles for us.