The past is a foreign country; they do things differently there.
石油开采的创新不是可选项,而是满足世界能源需求的必要条件。
The universe is a pretty big place. If it's just us, seems like an awful waste of space.
在科学领域,每一个被回答的问题都会引出新的问题,推动着发现的无限循环。
User thinking is more important than traffic thinking.
解析:菩提比喻智慧,明镜比喻清净心。本来清净,又哪里会染上什么尘埃?