strong object的意思|示意

You must remember that to make use of these classes you cannot maintain a strong reference to the object.

您必须记住，要使用这些类，您就不能保留对对象的强引用。

Astronomers theorize that a black hole forms when a massive object shrinks catastrophically under its own gravity, leaving only a gravitational field so strong that nothing escapes it.

天文学家的理论是，当一个巨大的物体在其自身的引力作用下灾难性地收缩，只留下一个强大的引力场，且没有任何东西能逃脱时，黑洞就形成了。

When you add a listener to an object, you're creating a direct, strong association between the widget and your listener (see Figure 2).

当您向一个对象添加侦听器时，您是在小部件和侦听器之间创建了一个直接的、牢固的关联(参看图2)。