三级

A colonel is three steps above a captain.

上校比上尉的别高三。

The control system is a kind of hierarchical control system,which is composed of teach box,main microcomputer and hypogenous microcomputers.

控制系统采用模块化、分布单片机控制方，分为示教盒、主机、下位机三。

Conclusion:Symmetric recession of internus in alternative esotropia can improve the success rate and the binocular vision function.

交替性内斜视手术采用同等量内直肌后徙术，不但手术成功率高，而且有利于手术后双眼三功能的建立。

Accordingly, we raised the 3rd level kind, for example 2 class kind natural meadowy differentiate in the 3rd class for natural meadowy and degrade natural meadowy two group.

因此 ,们增加了第三类 ,例如将二类的天然牧草地在第三划分为天然牧草地和退化天然牧草地两个小类。

Whereby providing the reliable basis of the dam cast and for corresponding temperature control measures during the overfall dam construction in high temperature with three level pumpcrete machines.

从温控的角度,为皂市大坝高温季节采用三配混浇筑溢流坝段的可行性提供了可靠的参考依据。

Scientists on Wednesday raised the alert level for Anak Krakatoa and Tangkuban Prahu -- which regularly spew gas and rumble -- from "normal" to "warning," the middle of three alert levels.

上周三，科学家们将喀拉喀托火山和唐库班珀拉胡火山的警戒度由“正常”提高到“警告”，三警戒的中间等，因为这两座火山近来定期喷出火山灰，并发出隆隆的声音。