前后和后肢的动作在伸长的瞬间应当是均等的。

The movement of the fore and hind legs should reach equally forward in the moment of the extension.

youdao

I call this the broaden-and-build theory of positive emotions because positive emotions appear to broaden people's momentary thought action repertoire and build the enduring personal resources.

我称其为积极情绪的扩建理论,因为积极情绪似乎能扩展人们的瞬间想法,和动作指令库并建立持久的个人资源。

哈佛公开课 - 幸福课课程节选