synergism

The synergism between the two chemicals produces a stronger cleaning effect than either has alone.

用法提示：synergism 作名词，表示“协同作用”，在此作主语。

Their successful project was a result of the synergism among the three departments.

用法提示：synergism 作名词，表示“协同作用”，在此作介词宾语。

In nature, synergisms between different species can benefit the whole ecosystem.

用法提示：synergisms 是 synergism 的复数形式，表示“协同作用”，在此作主语。