名詞 dry cell:

1. a small Leclanche cell containing no free liquid; the electrolyte is a paste and the negative zinc pole forms the container of the cell; used in flashlights, portable radios, etc.

1. The difference in the electrical condition of the terminals "+" and "-" of the dry cell which tends to make electricity flow we describe as a difference of electrical potential.
   電(子)之所以流動，是因為干電池上正負兩端上的電的狀況有差別所致，對于這種差別，我們稱之為“電位差”。
2. I have to buy a new dry cell.
   我必須買一節(jié)新的干電池了。