Members of the city's shrinking population must fill water containers by hand at public wells throughout the city.

这座城市不断减少的人口必须在全市各地的公共水井用手往容器里装水。

When there was no research equipment, they had to extract herbs using household water containers.

在没有研究设备的情况下，他们不得不使用家用水容器提取草药。

To understand this, think of all the things you and others touch at an airport. The check-in area, seats, the controls on water containers, tabletops.

为了方便理解，可以想想你和其他人在机场接触到的所有物品。