[译] 不到一星期，我竟然坐在了飞机上。
[误] Within a week, I found myself on board of an aeroplane.

[正] Within a week, I found myself on board an aeroplane.
[注] on board 用作复合介词，后面不能再用 of，例如：on board a ship 在船上/on board a train 在火车上。