这句话里如果英文是要表达在飞机上,可以说on board或是in aircraft,为什么这里要说 On board the aircraft?
On board the aircraft 是一种很常用的词序。如:
on board the ship (摘自《朗文高级英语应试词典》)
on board the train /on board (the boat/ train/bus/plane) (摘自《韦氏高阶英汉双解词典》)