空中: in the sky; in the air; aerial; overhead; midair 短语和例子在空中翻筋斗 make a somersault in midair; 在大战期间伦敦受到来自空中的袭击。 during the great war london was attacked from the air. 首次在空中航行的飞行器是气球。 the first
输送: deliver; supply; carry; transport; convey; feed; transmit; transfer; transportation; delivery 短语和例子石油通过输油管输送到炼油厂。 the oil is carried to the oil refinery by pipelines.; 输送槽 spout; 输送管 pipel
