adj.海面下的，海底的

The researchers deployed an undersea drone to study the previously unexplored depths of the ocean.
研究人员部署了一台水下无人机来研究以前未探索过的海洋深度。
An undersea earthquake triggered a massive tsunami that devastated coastal communities across the Pacific Rim.
一场海底地震引发了一场大规模海啸，摧毁了太平洋沿岸的多个沿海社区。
Engineers are developing new technologies for extracting undersea minerals, such as manganese nodules and rare earth elements.
工程师们正在开发用于开采海底矿物（如锰结核和稀土元素）的新技术。
The undersea cable network is a vital component of global telecommunications infrastructure, facilitating high-speed data transmission between continents.
海底电缆网络是全球电信基础设施的重要组成部分，可促进各大洲之间的高速数据传输。
Marine biologists have discovered a diverse ecosystem thriving in the undersea vents, where extreme conditions support unique forms of life.
海洋生物学家在海底热泉中发现了一个生机勃勃的生态系统，极端条件支持着独特生命形式的存在。
The treasure hunters equipped with advanced sonar equipment set out to locate the sunken ship lying on the undersea plateau.
财宝猎人们装备了先进的声纳设备，出发寻找沉睡在海底高原上的沉船。
Climate change is causing a rapid acidification of undersea environments, posing a severe threat to coral reefs and other marine organisms.
气候变化正在导致海底环境快速酸化，对珊瑚礁和其他海洋生物构成严重威胁。
The oil company plans to drill several undersea wells in the newly identified offshore oilfield to tap into its vast reserves.
这家石油公司计划在新发现的海上油田钻探几个海底油井，以利用其丰富的储量。
Archaeologists used remotely operated vehicles to investigate an ancient undersea city submerged by a sudden rise in sea level thousands of years ago.
考古学家使用遥控潜水器调查了一座因数千年前海平面上升而被淹没的古老海底城市。
A team of scientists conducted a groundbreaking study on the impact of undersea noise pollution on whale communication and behavior.
一组科学家进行了一项关于海底噪音污染对鲸鱼交流和行为影响的开创性研究。