It refers to space during dam crest level; it is above maximum deposited beachface, storage bottom and normal water level as well as under maximum flood level.
某坝顶标高时，最高沉积滩面、库底、正常水位三者以上，最高洪水位以下的空间。
2
Or take on that bully at the beach who kicks sand in your face?
还是想教训那个在沙滩上把沙子踢到你脸上的混蛋？
3
Most homeowners tend to downplay the risks they face, even if they're living directly above an earthquake fault or on the beach of an East Coast state.