sea level line

基本解释

Longing for level line of solemn sea!
渴望一級行莊嚴的大海！
Automatic target detection is very difficult in complicate background of sea and sky because of the clutter caused by waves and clouds nearby the sea-level line.
在海天線附近由於雲層乾擾和海麪襍波乾擾組成的複襍海空背景的影響，自動目標捕獲跟蹤睏難較大。
The line more than 3700 meters above sea level to over 5200 meters, mostly in no man's land lots, the traffic is extremely inconvenient and is at higher elevations in summer.
該線路海拔3700多米至5200多米，大部分屬於無人區地段，交通極爲不便，海拔較高且是夏季。
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