乐观是正常的，但一些幸运的人比我们其他人更乐观。
我不想只是一个歌手。我想成为一个表演者。
今天的投资研究可以预防明天的危机。
Innovation is the key to sustainable development in the oil and gas industry. We must embrace new technologies to drive efficiency and environmental protection.
The experimental violation of Bell inequalities shows that nature cannot be described by any local realistic theory.