He added the ultrasonic speakers are lowered into the seabed "a bit like a lobster pot".
Are you a robot?Please confirm you are a human by completing the captcha challenge below.。业内人士推荐WPS下载最新地址作为进阶阅读
d3sign/Moment via Getty ImagesFollow ZDNET: Add us as a preferred source on Google.，详情可参考safew官方版本下载
"It's for everybody."
Москвичей предупредили о резком похолодании09:45