sea level

US /ˈsiː ˌlev.əl/
UK /ˈsiː ˌlev.əl/
"sea level" picture
1.

海平面

the average height of the sea's surface, used as a standard reference point for measuring altitudes and depths on Earth

:
Mount Everest is 8,848 meters above sea level.
珠穆朗瑪峰海拔8,848米。
Many coastal cities are threatened by rising sea levels.
許多沿海城市受到海平面上升的威脅。