plays a part in

不良卫生习惯在病毒传播中起到了一定作用。

Poor hygiene ___plays ___a ___part ___in the transmission of viruses.

技术在特效发展中起到了一定作用。

Technology ___plays ___a ___part ___in the development of special effects.

酒精在约60%的暴力犯罪中起到一定作用。

Alcohol ___plays ___a ___part ___in around 60% of violent crime.