[ U ] special sound waves used in such processes as examining organs inside the body and directing the route of submarines超声波(用于人体器官检查、潜艇导航等)
They'll use ultrasound to monitor her ovaries.他们将利用超声波监测她的卵巢。
ultrasound scanning/imaging超声波扫描/成像
[ C ] an ultrasound scan超声波检查