大多数蝙蝠靠回声定位来飞行。Most bats navigate by echolocation.她在山顶上大声喊着,然后聆听着回声.She shouted on the mountaintop and listened for the echo.蝙蝠用一种回声测定法来判断距离.The bat judges distances by a kind of echo - location....
I don't grovel to anybody...我对谁都不会卑躬屈膝。I don't grovel to anybody.我对谁都不会卑躬屈膝。Don't grovel — stick up for yourself!你别卑躬屈膝──要自卫!Speakers have been shouted down, classes disrupted, teachers made to grovel.发言人的...