21世纪是开心交流的世纪；

21st Century is the Century of Communication with Happiness.

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“爱的模样”不仅仅是想要跟对方交流你们的爱的感觉，更是本能地反应地做任何会让对方开心的事。

The "look of love" not only communicates our feeling of love for someone, but also reflects our instinct to do whatever it takes to make that person happy.

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理解我们的愤怒让我们打开心门去交流让我们亲密无间。

Understanding our anger can open the door for communication and bring us toward intimacy.

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Rather, people smile when they wish to communicate happiness and we know that from several studies.

相反，人们微笑是渴望能开心地交流,从一些研究中，我们知道。

耶鲁公开课 - 心理学导论课程节选

You can communicate like good feeling with them with "I'm glad". So I recommend that you use it a lot.

你可以用“I'm glad”跟他们交流，表示你觉得和他们一起很开心。因此你可以多多使用这个句型。

I'm glad 课堂 - SpeakingMax英语口语达人

But it was a big, fake smile, the Pan Am smile, a smile to communicate "hello" and but it's as opposed to a smile where the communication is that of genuine happiness.

但那是大大的，虚假的微笑，泛美式微笑，微笑意味着你好,但与微笑截然相反,交流时微笑是真正开心的。

耶鲁公开课 - 心理学导论课程节选