B-unit
01
B单元, B机车
a non-powered locomotive unit that is coupled with a powered locomotive to provide additional traction or increase hauling capacity on trains
语法信息
有生性状态
无生命
形态构成
复合词
可数
复数形式
B-units
例子
The B-unit was coupled behind the lead locomotive to help pull the heavy freight train up the steep incline.
B-unit被连接在牵引机车后面，以帮助拉动重型货运列车上陡坡。
