These patterns are complex, and the complexity must be taken into account when selecting samples for analysis and when interpreting the results.
However, in reality, it's not the model which is complex, but it's the biology and ecology which are complex, and the model has to reproduce this complexity.
The problems are complex and the solutions equally so.
But these challenges are complex and the specifics vary across the country.
"The challenges that the opposition faces are complex and the game is just starting," wrote León.
Some of these issues are complex, and the debates are complex".
Experts warn that the motivations behind suicide are complex, and the recent deaths remain under investigation.
Biological processes, however, are complex and the prevailing mechanisms are either unknown or poorly understood.
But the negotiations are complex, and the issue of Gaza's blockade is central.
In the main, the rules of origin are complex and the paperwork time-consuming.
The factors contributing to it are complex, and the more we know, the more complicated the situation becomes.
