The soaptree yucca plant can make its stem grow longer to keep its leaves above the sand.

VOA: special.2010.01.04

she doesn't need their protection because God prizes chastity above all things and would gladly send a glistering guardian to keep her honor unassailed.

她不需要他们的保护,因为上帝珍惜贞操超过一起,他会很乐意派遣一个护卫来保护小姐的荣誉不被攻击。

耶鲁公开课 - 弥尔顿课程节选

To keep your head above water is a colorful expression that means staying out of debt.

VOA: special.2009.05.10

A company that can keep its head above water can survive economic hard times.

VOA: special.2009.05.10

Johnson says that the Buffalo Soldiers learned to keep their tempers under control, because if they didn't rise above a conflict, they'd be court-martialed and lose their jobs.

VOA: standard.2009.11.25