有谁知道电梯里的宣传屏幕英语怎么说？

根据你提供的信息，外国人可能是在问那个电梯里的屏幕是不是"Jet Trailer"。 然而，根据我所了解，电梯里的宣传屏幕通常被称为"elevator display"或者"elevator advertising screen"。如果你想和外国人交流并表达你在电梯里的发现，可以说："I heard two foreigners in the elevator, pointing at the screen and asking if it is a 'Jet Trailer'. But based on my knowledge, the screen in the elevator is usually referred to as an 'elevator display' or 'elevator advertising screen'." 这样你就可以跟他们进行进一步交流了。