I always thought people grew old gradually, but no, people grow old in an instant.
我一直以為人是慢慢變老的，其實(shí)不是，人是一瞬間變老的。
Technology will redefine how we extract and utilize coal resources.
可持續(xù)性不是一種選擇，而是我們對(duì)后代的責(zé)任。
There is no absolute security, only relative risk control.