副詞 on board:

1. on a ship, train, plane or other vehicle
   同義詞：aboard, onboard

1. Be meals serve on board?
   機(jī)上有餐飲供應(yīng)嗎？
2. Many of the tourists on board had begun bargaining with the tradesman.
   船上的很多旅客開(kāi)始與商人討價(jià)還價(jià)了。
3. The hijackers kept the pilot on board the plane as (a) hostage.
   劫機(jī)者把飛機(jī)駕駛員扣留在飛機(jī)上作為人質(zhì)。
4. We went on board Athens yesterday morning.
   我們昨天早晨登上雅典號(hào)。