sea water level海平面
sea-level correction[海洋] 海平面订正
sea-level density海平面密度
sea-level flight海平面飞行
sea-level prediction海平面预报
sea-level abnormality海平面异常
sea-level elevation海拔高度
Global sea-level全球海平面
sea-level海平面;海立体;海平面民宿
N-UNCOUNT（不可数名词） Sea level is the average level of the sea with respect to the land. The height of mountains or other areas is calculated in relation to sea level. 海平面
The stadium was 5,000 feet above sea level.
该体育场海拔5000英尺。