To write a good love letter， you ought to begin without knowing what you mean to say， and to finish without knowing what you have written.

"Language is not just a tool for communication, but a weapon of precision."

No man, for any considerable period, can wear one face to himself and another to the multitude, without finally getting bewildered as to which may be the true.

Nobody said it was easy.

The potential of CRISPR is vast, but we must use it responsibly.

We are all time travelers in the river of DNA.

生产的最终条件是生产条件的再生产。