科学60秒:强大程序帮你瞒天过海
Imagine that you want to send a secret message to your colleague at the CIA. You can ___1___ it to prevent counterspies from reading it. But they'll still know you were sending some sort of messa...
美句听写:人生之笔
假如有人给予你一支生命的笔……And of what would you write: Of love? Hate? Fun? Misery? Life? Death? Nothing? Everything? Would you write to please just yourself? Or others? Or yourself by writing