运动员的血糖水平在比赛后明显下降。

The athlete's blood sugar ___levels dropped significantly after the race.

图书馆的每一层都有不同的主题分类。

Each ___level of the library has a different subject category.

用水平仪检查一下桌子是否放平了。

Check if the table is flat with a ___level.

我们需要确保桌面完全平整才能开始安装。

We need to make sure the table is completely ___level before we start the installation.

老师调整了作业难度，以确保对所有学生都公平。

The teacher ___leveled the homework assignments to make them fair for all students.