Figure 19: Validating the boundary objects.

图19：验证边界对象。

youdao

As all objects start on an 8 byte boundary, and the size is divisible by 8, the bottom 3 bits are not used for the size; we use them for flags to indicate different states of the object.

因为所有对象都是从8字节边界开始，并且大小可以被8整除，所以底部的3位不用于表示大小；我们将其作为标志，用于表示对象的不同状态。

youdao

We know nothing about events which happen once objects pass this boundary.

一旦物体超过这个这个边界，我们对所发生的事便一无所知。

youdao

But we are the only species to have defined a geological period by our activity something usually performed by major glaciations, mass extinction and the colossal impact of objects from outer space, like the one that defines the upper boundary of the Cretaceous.

FORBES: On The Anthropocene Age