This is their primary function.

这是它们的主要功能。

So being liked isn't its primary function.

所以让别人喜欢并不是主要的功能。

Tagging isn't even the primary function of Del.icio.us.

但标签并不是Del . icio . us三。的唯一主要功能。

The programmer contains only the primary function controls.

该种程序器只具有基本功能的控制件。

The primary function attributed to the insula is disgust, not love.

岛叶的主要功能是恨，而不是爱。