孩子们在跷跷板上玩得上上下下。

The kids played on the seesaw with an ___up-and-down movement.

这家餐厅的菜品质量时好时坏，评价褒贬不一。

The food quality at this restaurant is ___up-and-down, with mixed reviews from customers.

这家餐厅的评价好坏参半，有些人很喜欢，有些人则觉得一般。

The reviews for this restaurant are ___up-and-down, some people love it while others think it's just average.