Inner classes can refer to mutable instance fields if the inner-class expression occurs in an instance context, but this is not the same thing.

如果内部类表达式出现在某个实例上下文中的话，内部类可以引用可变的实例域instance field，但这不是同一回事。

youdao

You can also write contract tests on classes or aspects, where you can define tests on constructors and invariant conditions on instance fields.

也可以在类或方面上编写合约测试，在这些类或方面中可以在构造函数上定义测试，在实例字段上定义不变条件。

youdao

Without beforefieldinit, the runtime must run the type constructor at a precise time-just before the first access to static or instance fields and methods of the type.

如果没有beforefieldinit，运行库就必须在某个精确时间运行类型构造函数，即，恰好在第一次访问该类型的静态或实例字段和方法之前。

youdao

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。

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One proposal, for instance, involves using large, awkward magnetic fields to cool the electrons down.

ECONOMIST: Microelectronics

Their size allows them to specialise in niche activities for instance, pumping out the last drips of oil from mature fields which giant firms tend to avoid because they take up so much management time.

ECONOMIST: Small oil firms

For instance, they could play a huge role in elder care and other health fields.

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