指挥官派出一支人数不多的摩托化部队去掩护其暴露的侧翼。
The commander threw out a thin screen of motorized troops to protect his exposed flank .
同日晚间，德国的摩托化部队进抵塞尔维亚边境。
And the same evening German motorised elements reached the Serbian frontiers .
摩托化部队摩托化部队摩托化部队