Additionally, Dragon Runner SUGV, gives operators field-changeable frequency capabilities, using analogue or digital radio options.

此外，通过模拟或数字无线电选项，“龙信使”可以为操作人员在野外环境提供可变频通信能力。

youdao

Two methods and devices which are changeable aperture and movable aperture for measuring the mode-field radius of single-mode optical fibers are presented.

介绍两种快速测量单模光纤模场半径的方法及其测量装置——可变孔径法和移动圆孔法；

youdao

Field trials are complex and changeable for field conditions, research is relatively weak.

田间试验则由于现场条件复杂多变，相关研究比较薄弱。

youdao

The Sun's changeable magnetic field is generated at the boundary between these two layers, where strong electric currents flow.

BBC: Sun, Trace