If such classes are not available at runtime, it'll throw that exception.
如果这样的类在运行时不可用,它会抛出该异常。
Available microwave switch configurations include a simple single-pole double throw (SPDT) switch, multi-position switch, matrix, and cascade.
可用的微波开关配置包括简单的单刀双掷(SPDT)开关、多位置开关、矩阵和级联开关。
The app makes it easy to throw in photos and video, and to set your status so people know if you're available.
这款应用程序令照片和视频分享变得很简便,另外,设置自己的状态也很容易,这样别人就知道你是否有空了。
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