可持續(xù)發(fā)展不再是可選項(xiàng)，而是任何負(fù)責(zé)任的采礦業(yè)務(wù)的必要條件。
The pain of parting is nothing to the joy of meeting again.
The Langlands program is a vision of how mathematics could be seen as a single, coherent whole.
The Internet is a reflection of our society and it magnifies both the good and the bad.