shǒujī / de / liǎngmiànxìng / zàiyú / jì / fāngbiàn / shēnghuó / yòu / róngyì / ràng / rén / chénmí手机的两面性在于既方便生活又容易让人沉迷。The dual nature of smartphones is that they make life convenient but also easily addictive.