天下之事，患常生于忽微，而志亦戒于渐肆。
天下的事情，祸患常常产生于疏忽细微之处，而人的志向也要警惕逐渐放纵。
In chemicals, our greatest challenge is also our greatest opportunity: meeting global needs while protecting the planet.
我是一个普通人，只是碰巧网球打得好。
Anything you say before the word “but” does not count.