For demonstration purposes, I have created a package called business using an Ant build process. There are several reasons for the independent business layer.

为了便于说明，我使用Ant构建进程创建了一个称为business的包。

youdao

Interestingly, Mr. Davis has cited the importance of layered or "tiered" defense among his rationales for restarting the canceled E2I secondary interceptor for the single ground-based defense site he advocates -- despite the fact that the E2I system does not represent an independent layer.

CENTERFORSECURITYPOLICY: Center For Security Policy

Some experts have commented that Angel Ambush was not 'real' augmented reality at all, because the virtual angel was just a layer of video manipulated by a human operator, rather than an independent 3D object.

BBC: Augmented reality goes beyond gimmicks for business