由于打架事件，学校最近宣布了三名学生被开除。

The school recently announced three ___expulsions due to the fighting incident.

由于签证违规，三名外国人面临强制出境。

Three foreigners face ___expulsion due to visa violations.

当你挤压气球时，空气的排出会产生响声。

When you squeeze a balloon, the ___expulsion of air makes a popping sound.