(with air /in air /by air ./through air)

(with air /in air /by air ./through air) with air in air by air throght air 哪个是fly的意思?急急急! air with love,in the air fly through the air by the air or by air travelling by air by air造句 Travelling by air.. By air 合适么? by air是什么意思 in the air on the air