这个大学项目是一个为期两年的课程。

This university program is a ___two-year course.

这个植物园每两年举办一次大型花展。

The botanical garden holds a major flower show every ___two-year period.

这个两岁大的孩子已经开始学说话了。

The ___two-year child has started to learn to speak.