We are optimistic about the future, but we know that optimism alone is not enough.
我们对未来持乐观态度，但我们知道仅靠乐观是不够的。
伟大的沙漠为了绿叶的爱而燃烧，而她摇摇头、笑著、飞走了。
梦想的路上，每一步都算数。
每一滴石油都应该被高效和负责任地使用。
Social connection is one of the strongest predictors of happiness.
A company's culture is defined by the actions of its leaders.
习惯的强度是其被强化次数的函数。
Learning consists in the modification of certain mediating processes which operate between the stimulus and the response.