double-back tape双面粘带
double gear back双重齿背
double wing back双边卫队形
Double Vent Back双排气回
Double e Back Elbow双人反身肘击
double e back往回跑;把…对折
V(动词) to go back in the opposite direction (esp in the phrase double back on one's tracks) (尤指用在词组"double back on one's tracks"中)沿原路返回