carefully using their sonar to scan the forest floor for fish. 仔细地用声纳扫描林地表层寻找鱼类为食
They're guided by their sonar. 它们靠声纳导航
The dolphin scan the water ahead with their sonar. 海豚利用声纳扫描大海
In these murky waters they rely on sonar to navigate and hunt. 它们利用回声定位 在昏暗的水中探路和捕食