translation.en: This is one of the ways that vaccines are carried: These are Styrofoam chests. These are being carried by people, but they're also put on the backs of pickup trucks.
translation.zh: 这是其中一种 携带疫苗的方法。 这些是聚苯乙烯泡沫箱。由人来携带， 或是用卡车装运。