1. The bat judges distances by a kind of echo-location. 蝙蝠用一种回声测定法来判断距离。
2. This is a kind of sonar - an echo-location system. 这是一种声纳装置,一种回声定位系统。
3. If you buy a bat detector you can pick up their high-pitched echo-location calls as well. 如果你购置了一个蝙蝠探测器,你还可以探测蝙蝠高音的回声,便知它们的位置。
4. This echo-location in bats is often compared with radar, the principle of which is similar. 蝙蝠这种回声定位常常可与雷达相比较,其原理是相似的。
5. Detection of echo energy could reveal the presence of a target and its location, size, shape, density and intensity. 检测回波能量就可获知目标物的存在、位置、大小、形状、浓度及强度。