The function includes three levels: proposition function, logic connection function and discourse marking function. Furthermore, the three functions are grammaticalized in sequence.

其篇章连接功能包括三个层次，分别为：命题功能、逻辑关联功能和话语标记功能，并且这三个层次的功能是依次虚化的。

youdao

In the middle of its forehead is a black marking -- it doesn't actually serve a particular function, instead serving as a "legacy" design, where the toy's IR sensors once lived.

ENGADGET: Furby gets a reboot for 2012, we go hands-on (video)

It was a feat Morgan and his crew would repeat across the industrial landscape, arranging new equilibrium conditions and regulatory mechanisms in one sector after the other, filling in for a non-existent central banking function (the Federal Reserve was created in 1913, marking the start of a whole new story).

FORBES: Entrepreneurs are the New Labor: Part I