 However , complexity, diversity, frequently changed workloads, and rapid evolution of big data , especially AI systems raise great challenges in benchmarking .
<fluency>  However , complexity, diversity, frequently changed workloads, and rapid evolution of big data , especially AI systems raise great challenges in benchmarking .
 However , complexity, diversity, frequently-changed workloads, and rapid evolution of big data , especially AI systems raise great challenges in benchmarking .