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....
他们指出了把冶金工业采用的断裂标准应用于增强塑料的不适合性.They point out inadequacies in applying criteria developed from metallurgical practice to reinforced plastics.呼吸器与使用者脸部的适合性(适配行)是非常重要的.Fit of the respirator to the face is very important.只有供...
我打了个寒战，用围巾把脖子围得更紧了。I shivered and pulled my scarf more tightly round my neck.不过这次痛已减退,寒战也停止了.But the pain had ebbed away and the trembling had stopped.他觉得很冷, 禁不住打寒战, 牙齿格格打颤.He felt very cold, he was shaking uncontrollabl...