What is the concept of "bridge" in film terminology?

When the word "bridge" became popular has always been difficult to verify. When it is associated with movies, it generally refers to a more classic or popular film expression. It can be a narrative way, such as rearranging and combining the time sequence of stories; It can also be some specific scenes, such as "the time bomb always stops at the last second"; It can also be used in combination with movie types, such as the thriller scene of Love at First sight or the westerns scene of The Last Duel.

Since the birth of the film 100 years ago, there have been countless bridges. It is almost impossible for a new film to completely touch the bridge. The key lies in how much the bridge is used and how reasonable it is used. Especially for genre films, it is based on bridges, so how to use bridges to truly show the value of a commercial film.