世间万物，没有孤立存在的，必然有其对立面。

The most perfect education, in my opinion, is such an exercise of the understanding as is best calculated to strengthen the body and form the heart.

Natural gas will play a crucial role as a bridge fuel in the transition to a lower-carbon future.

有时候，最难的事情和正确的事情是同一件事。

The best way to predict the future is to create it.