We need more comprehensive, controlled trials with plenty of subjects before we can come to any real conclusions.

我们需要研究主题足够多的更全面的对照实验，在得出任何真实结论之前。

The exercises focus on practicing joint maritime and aerial combat readiness patrols, joint seizure of comprehensive battlefield control, and joint precision strikes of key targets, Li said.

李说，演习重点演练海空联合战备巡逻、联合夺取战场综合控制权、联合精准打击重点目标等。