1.They are not conventional steel containers; with their smooth skins, they may have been "reefers" or refrigerated containers, although there are a number of smooth-skinned types out there.
所用集装箱不是普通的海运箱，其外表是平面的，可能是采用冷藏箱制作。
2.They are not conventional steel containers; with their smooth skins, they may have been "reefers" or refrigerated containers, although there are a number of smooth-skinned types out there.
