The essential change is that models are no longer used only as mere documentation for programmers, but can now directly be used to drive software development.

Whats essential is that we should respect, accommodate and help each other instead of forcing our own ideas on each other. In real life no one is able to change others.

The stable quicklime burden is essential to improve the sinter ore quality based on the analysis of quality before and after belt change at No. 2 sintering workshop.