sea level

noun

1. level of the ocean's surface (especially that halfway between mean high and low tide)
used as a standard in reckoning land elevation or sea depth

1. 海平面
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 .

e.g. The stadium was 2275 metres above sea level...
这个体育馆海拔 2,275 米。
e.g. The whole place is at sea level...
整个地区与海平面齐平。

1. 海平面：海平面(Sea level)是海的平均高度. 指在某一时刻假设没有潮汐、波浪、海涌或其他扰动因素引起的海面波动,海洋所能保持的水平面. 其高度系利用人工水尺和验潮仪长期观测而得. 按观测的时间长短不同分为:日平均、月平均、年平均和多年平均海平面.

2. 重大工程：海平面:sea-level | 重大工程:sea level | 粗糙海面:Rough sea surfaces

3. 海拔：3. 巅峰 highest peak | 4. 海拔 sea level | 5. 九曲十八盘 the zigzag and tortuous paths

4. 海平面;潮位：sea level 海平面 | sea level 海平面;潮位 | sea lighter 海驳