narrow road
... narrow down 缩小;限制;减少;变窄 narrow road 窄路;窄道 in a narrow sense 在狭义上 ...
Road narrows
... 不准掉头 No Turns 窄路 Road narrows 滑路 Slippery road ...
bottleneck
... boost v.提高,增加,宣扬 bottleneck n.瓶颈,窄路,阻碍 bottom adj.最后的,根本的v.到达底部,建立基础 ...
throat
... throat 喉 throat 喉部;窄路 throat 临界截面 ...