“在飞机上”常见的英文表达有 on the plane 或 in the airplane(美式英语中常用 airplane,英式英语则常用 aeroplane ,不过 on the plane 是更通用、更常用的说法)。
I left my phone on the plane.(我把手机落在飞机上了。)
She always reads a book in the airplane during long - haul flights.(在长途飞行中,她总是在飞机上读书。 )