Set the tray on top of the two cups, with the hot cup under one end and the cold cup under the other.
将托盘放在两个杯子的上面，热杯在一端，冷杯在另一端。
2
The system required to deliver a vaccine is called the “cold chain,” so named for the set of facilities that keep a vaccine cold as it is distributed from the manufacturer to the people who need it.