To understand chemistry at its most fundamental level, we must look at the dance of electrons in molecules.
真相很少是纯粹的,也绝不简单。
The market is a great teacher, but it charges a high tuition.
一本好书是一次伟大的冒险。
成功的关键是专注于目标,而不是障碍。
The stone industry must embrace sustainability to survive in the long run.