1. (of an airplane) flying in the right direction(飛機)航向正確
A radio signal tells the pilot of an airplane when he is flying on the beam. 無線電信號向飛行員指明其飛行航向正確。
2. doing well;just right正確的;幹得好
Dick's answer was right on the beam. 狄克的回答是正確的。
You are on the beam today. You haven't made a single mistake. 你今天幹得很好,沒有出一點差錯。