So we don't have to keep the speed constant.
不用保持速度恒定。
The final value that motion can take is linear, which keeps animation speed constant.
最后，motion 属性还可以带的一个值是linear，该属性让动画以恒速变化。
Two control ring work together to realize variable speed constant frequency.
运行时机组的两个控制环同时工作，实现变速恒频。
Variable speed constant frequency generating system has been used in modern aircraft.
变速恒频电源系统已在现代飞机上使用。
Variable speed constant frequency generating system has been used in modern aircraft.
变速恒频电源系统已在现代飞机上使用。
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