headway

名词 headway:

1. vertical space available to allow easy passage under something
   同义词：headroom, clearance
2. forward movement
   同义词：head

1. Did you make any headway in your research work?
   你们的研究工作有进展吗？
2. We are making little headway with the negotiations.
   我们在谈判中没有取得什麽进展。
3. The boat made slow headway against the tide.
   那船逆著潮水缓慢地前进。

head.way

n.（名词）
Forward movement or the rate of forward movement, especially of a ship.
前进速度：尤指船向前的运动或向前运动的速度
Progress toward a goal.
朝向目标的前进
The clear vertical space beneath a ceiling or archway; clearance.
净空高度：在天花板或拱下没有物体的垂直空间；净空
The distance in time or space that separates two vehicles traveling the same route.
间隔距离：在同一路线上行驶的车辆之间在时间或空间上的距离