XML Schema 1.1 extended this further by providing a mechanism to accept sub-elements other than those explicitly defined in the content model.

XML Schema 1.1 通过提供一种机制来接受除内容模型中显式定义的子元素之外的子元素，进一步扩展了这一特性。

youdao

This model includes two sub-models: one is hydrodynamic model and the other is ecosystem dynamic model.

该模型包括了两个子模型，即水动力学子模型和生态系统动力学子模型。

youdao

Then, the general model is decomposed into two correlated sub-problems:one is a pure-implementation problem, and the other is a decision problem.

接着，对这个一般模型进行了分解，并据此对委托实现决策问题的实质进行了剖析；

youdao

The Standard Model is a framework that explains how the known sub-atomic particles interact with each other.

BBC: Higgs boson 'hints' also seen by US lab