The researchers said both methods greatly reduced the risk of H.I.V.infection.

VOA: special.2009.07.29

So inside of an instance, associated with an instance, we have both methods and fields.

还有一些内部变量，实际上我该这么说，我们通常把这些东西称为域。

麻省理工公开课 - 计算机科学及编程导论课程节选