Thinking is behavior. The muscular habits learned in overt speech are responsible for implicit or internal speech (thought).

从长远来看，经济前景是乐观的。

可持续性不仅仅是环境问题，它还关乎我们业务和所在社区的长期生存能力。

研究不仅仅是回答问题，还要提出正确的问题。