One such meeting was being held on board a ship on day.
老师,on board a ship=on a ship board吗,还是on board=on a ship省略了都可以?
on board为介词+名词构成的习语。其意义之一是“在飞机/船/火车上”。例如:
The plane had 125 passengers and crew on board.
on board还可以作为短语介词,后接名词(飞机、船或火车)。例如:
A customs officer came on board the ship.
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