helipad/ˈhel.ə.pæd/名词(单架)直升机起落场After a long journey, the exhausted hikers were relieved to spot a helipad and knew they would soon be rescued.经过漫长的徒步旅程,疲惫不堪的徒步者看到了一个直升机停机坪,他们松了一口气,知道自己很快就会被救援。想跟读,去练习