On board, board, means to be on a plane, or a train, or a bus, or a ship.

“On board”（board）指的是在飞机、火车、公共汽车或轮船上。

And let us order magicians and jugglers and dancing girls and flute players, all to be on board tomorrow night.

让我们去约请魔术师、杂耍演员、跳舞姑娘和吹长笛的乐师，请他们明天夜间都到船上来。

Such specific antidotes and personal protective devices should be on board whenever dangerous goods are carried.

凡船舶载运危险品时,船上应备有此类专用解毒剂和个人保护装置.

We may be getting closer to a Downton Abbey movie. Star Michelle Dockery recently said she'd be on board for a film version of the British drama.

我们离《唐顿庄园》电影版又进了一步。《唐顿庄园》女星Michelle Dockery最近表示她愿意加入这部英剧的电影版。