基本解釋回頭曲線英英字典柯林斯英英字典 A hairpin curve or a hairpin is a very sharp bend in a road, where the road turns back in the opposite direction. hairpin curve劍橋字典hairpin curve柯林斯字典專業(yè)釋義交通運(yùn)輸工程發(fā)針形曲線